-------------
      name:  <unnamed>
       log:  C:\D\projekte\Replication McCabe_Snyder\McCabe_Snyder_ReStat_Table_4.smcl
  log type:  smcl
 opened on:  24 Mar 2017, 10:43:35

.
. **********************************************************************
. *
. * Program McCabe_Snyder_ReStat_Table_4.DO
. *
. * Runs regressions behind Table 4
. * Subscription Elasticities for Selectected Channels.
. *
. * McCabe & Snyder August 2013
. *
. **********************************************************************
.
. **********************************************************************
. *
. * Note on computation of subscription elasticity. Take marginal effect,
. * which is IRR - 1.  Then multiply by mean number of subscribers.
. * Relevant means are provided after each regression.
. *
. **********************************************************************
.
. * Set initial Stata parameters
. version 12

. set more 1

. set memory 900m
set memory ignored.


Memory no longer
needs to be set in modern Statas;
memory adjustments are performed on the fly
automatically.


. set matsize 4000

. #delimit ;
delimiter now ;
. use McCabe_Snyder_ReStat_combined;

. summ;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     journal |     60,453    75.22565    53.00826          4        229
       pyear |     60,453    1979.671    11.73278       1956       2005
       cyear |     60,453    1994.847    7.148305       1980       2005
cusa_sing_~h |     60,453    10.90015    18.42545          0        225
ceng_sing_~h |     60,453    3.618811    6.116916          0        114
-------------+---------------------------------------------------------
ceur_sing_~h |     60,453    2.985526    5.854751          0         95
coth_sing_~h |     60,453    1.129423    2.525747          0         49
        issn |          0
    fpubdate |     60,453    1947.552    26.46888       1844       1988
        own1 |     60,453    .0065671    .0807717          0          1
-------------+---------------------------------------------------------
      jstor1 |     60,453    .0248623    .1557066          0          1
    ingenta1 |     60,453    .0052934    .0725633          0          1
   proquest1 |     60,453    .0194035    .1379396          0          1
      ebsco1 |     60,453    .0434222    .2038072          0          1
       gale1 |     60,453    .0073445    .0853858          0          1
-------------+---------------------------------------------------------
       oclc1 |     60,453    .0038212    .0616977          0          1
        own2 |     60,453     .019999    .1399978          0          1
      jstor2 |     60,453    .1180587    .3226802          0          1
    ingenta2 |     60,453    .0054092    .0733484          0          1
   proquest2 |     60,453    .0802938    .2717497          0          1
-------------+---------------------------------------------------------
      ebsco2 |     60,453    .0824773    .2750928          0          1
       gale2 |     60,453    .0361769    .1867316          0          1
       oclc2 |     60,453    .0172034    .1300299          0          1
        cusa |     60,453    21.27597    36.34841          0        404
        ceng |     60,453     6.23974    10.71303          0        180
-------------+---------------------------------------------------------
        ceur |     60,453    5.529817    11.20683          0        201
        coth |     60,453    2.125866    4.679829          0        100
        cmis |     60,453    .5693679    1.273637          0         22
       digz1 |     60,453    .0002481    .0157502          0          1
       digz2 |     60,453    .0001654    .0128605          0          1
-------------+---------------------------------------------------------
   elsevier1 |     60,453    .0126545    .1117789          0          1
   elsevier2 |     60,453    .0461516     .209815          0          1
  blackwell1 |     60,453    .0029279    .0540312          0          1
  blackwell2 |     60,453    .0078573    .0882935          0          1
     ingaoc1 |     60,453    .0111492    .1050002          0          1
-------------+---------------------------------------------------------
     ingaoc2 |     60,453     .051263    .2205354          0          1
    jss2_usa |     60,453    .6965416    2.252154          0      10.96
    jss2_eng |     60,453    .1013045     .335692          0       1.76
    jss2_eur |     60,453    .1321814    .4711944          0       2.77
    jss2_oth |     60,453    .1499141    .5599059          0       3.49
-------------+---------------------------------------------------------
        jss2 |     60,453    1.079942    3.556491          0      18.98
     es2_usa |     60,453    .0110188    .0779576          0       1.15
     es2_eng |     60,453    .0184732    .1299557          0       1.87
     es2_eur |     60,453    .0092533    .0647896          0         .9
     es2_oth |     60,453    .0108962    .0780014          0       1.15
-------------+---------------------------------------------------------
         es2 |     60,453    .0496415    .3498687          0       5.07
      cit_20 |     53,437    2.984674    5.791662          0        103
   cit_20_40 |     53,437    3.355802    7.523935          0        342
   cit_40_60 |     53,437    4.079439    8.433056          0        133
   cit_60_80 |     53,437    6.533713    13.20245          0        158
-------------+---------------------------------------------------------
      cit_80 |     53,437    20.89648    36.55057          0        562
quintile_m~e |     60,453    2.767886    .6405921          1          3
 fraction_80 |     53,840    .1442456     .112933   .0033223   .8333333
   cit_total |     60,453    35.74076      59.352          0        771
   obs_count |     60,453    76.10696    65.71754          6        706
-------------+---------------------------------------------------------
  count_null |     53,840    64.92593    65.79545          0        693
count_obs_80 |     53,840    8.360141    7.462537          1         67

. * Set threshold to screen out observations forcing us to estimate;
. * OA variables with few degrees of freedom behind them;
. gen threshold = 10;

. ***************************************************************;
. *** Create cyear variables and journal volume fixed effects ***;
. ***************************************************************;
. forvalues num = 1956/2005 {;
  2.    quietly gen byte py`num' = (pyear == `num');
  3.    };

. forvalues x = 80/99 {;
  2.    quietly gen byte c`x' = (cyear == 1900 + `x');
  3.    };

. forvalues x = 0/4 {;
  2.    quietly gen byte c0`x' = (cyear == 2000 + `x');
  3.    };

. * create journal volume fixed effect groups;
. sort journal pyear;

. egen volume = group(journal pyear);

. ********************************************************************;
. *** Generate digitization variables                              ***;
. ********************************************************************;
. * Generate channel count variables;
. gen partial = own1 + elsevier1 + jstor1 + ingenta1 + gale1 + oclc1 +  blackwell1 + ebsco1 + proquest1 + digz1;

. gen full    = own2 + elsevier2 + jstor2 + ingenta2 + gale2 + oclc2 +  blackwell2 + ebsco2 + proquest2 + digz2;

. gen other_partial = own1 + ingenta1 + gale1 + oclc1 +  blackwell1 + ebsco1 + proquest1 + digz1;

. gen other_full    = own2 + ingenta2 + gale2 + oclc2 +  blackwell2 + ebsco2 + proquest2 + digz2;

. * Generate other variables;
. gen op = (other_partial > 0) & (other_full == 0);

. gen os = (other_partial == 0) & (other_full == 1);

. gen oh = (other_partial > 0) & (other_full == 1);

. gen om = other_full >= 2;

. * JSTOR partial dummy;
. gen jp  = jstor1 > 0;

. * JSTOR subs variables;
. gen jsfs = jss2 * (jstor1 == 0) * (jstor2 == 1) * (other_partial == 0) * (other_full == 0);

. gen jsfp = jss2 * (jstor1 == 0) * (jstor2 == 1) * (other_partial > 0) * (other_full == 0);

. gen jsfd = jss2 * (jstor1 == 0) * (jstor2 == 1) * (other_full >= 1);

. * Elsevier dummies for partial access and full access to current content;
. gen ep  = elsevier1 > 0;

. gen ecf = (elsevier1 == 0) * (elsevier2 == 1) * (es2 == 0);

. * Elsevier subs;
. gen esf = es2 * (elsevier1 == 0) * (elsevier2 == 1);

. * Dummies for screening;
. gen jsfs_dum = jsfs > 0;

. gen jsfp_dum = jsfp > 0;

. gen jsfd_dum = jsfd > 0;

. gen esf_dum = esf > 0;

. * Interact with citation-year blocks;
. gen c95_99 = (cyear >= 1995 & cyear <= 1999);

. gen c00_05 = (cyear >= 2000 & cyear <= 2005);

. foreach abbrev in op os oh om jp ep ecf {;
  2.    quietly gen `abbrev'95 = `abbrev' * c95_99;
  3.    quietly gen `abbrev'00 = `abbrev' * c00_05;
  4.    };

. drop c95_99 c00_05 op os oh om jp ep ecf;

. * Generate remaining variables;
. gen cit = cusa + ceng + ceur + coth + cmis;

. gen age = cyear - pyear;

. gen age2 = age^2;

. gen age3 = age^3;

. gen age4 = age^4;

. save temp_data_subs, replace;
(note: file temp_data_subs.dta not found)
file temp_data_subs.dta saved

. **********************************************************************;
. *** 1956-1965                                                      ***;
. **********************************************************************;
. gen plower = 1956;

. gen pupper = 1965;

. keep if pyear >= plower & pyear <= pupper;
(51,509 observations deleted)

. * Create fixed effects for publication x citation year interactions;
. * Drop the 2005 cyear to avoid multicolinearity with the constant;
. * Don't create variables with pyear after cyear;
. * Do create variables with pyear = cyear since keeping age0 = 1 observations;
. forvalues y = 56/99 {;
  2.    forvalues x = 80/99 {;
  3.       quietly gen ip`y'c`x' = py19`y' * c`x' if
>          (`x' >= `y')
>        & (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 56/99 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip`y'c0`x' = py19`y' * c0`x' if
>          (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 0/5 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip0`y'c0`x' = py200`y' * c0`x' if
>          (`x' >= `y')
>        & (2000 + `y' >= plower)
>        & (2000 + `y' <= pupper);
  4.    };
  5. };

. foreach var of varlist ip* {;
  2.    capture assert !missing(`var');
  3.    if _rc {;
  4.       drop `var';
  5.    };
  6. };

. egen title = group(journal);

. rename journal smournal;

. quietly tabulate title, generate(journal);

. drop title;

. foreach var of varlist journal* {;
  2.    quietly gen ia1`var' = age * `var';
  3.    quietly gen ia2`var' = age2 * `var';
  4.    quietly gen ia3`var' = age3 * `var';
  5.    quietly gen ia4`var' = age4 * `var';
  6. };

. rename smournal journal;

. * avoid multicolinearity by dropping first journal's age profile;
.  drop ia1journal1 ia2journal1 ia3journal1 ia4journal1;

.  * screen for small numbers within digitization categories;
. foreach var in op95 op00 os95 os00 oh95 oh00 om95 om00
>                jp95 jp00
>                ep95 ep00 ecf95 ecf00
>                jsfs_dum jsfp_dum jsfd_dum esf_dum {;
  2.    quietly egen countvar = total(`var' > 0);
  3.    drop if (countvar <= threshold) & (`var' > 0);
  4.    drop countvar;
  5.    };
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)

. * apply second screen to pick up newly created small categories;
. foreach var in op95 op00 os95 os00 oh95 oh00 om95 om00
>                jp95 jp00
>                ep95 ep00 ecf95 ecf00
>                jsfs_dum jsfp_dum jsfd_dum esf_dum {;
  2.    quietly egen countvar = total(`var' > 0);
  3.    drop if (countvar <= threshold) & (`var' > 0);
  4.    drop countvar;
  5.    };
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)

. * Run regression;
. xtpqml cit ip* ia1j* ia2j*
>            op95 op00 os95 os00 oh95 oh00 om95 om00
>            jp95 jp00
>            ep95 ep00 ecf95 ecf00
>            jsfs jsfp jsfd esf,
>            i(volume) irr fe cluster(journal);
note: 22 groups (572 obs) dropped because of all zero outcomes
note: ia1journal25 dropped because of collinearity
note: ia2journal25 dropped because of collinearity
note: op95 dropped because of collinearity
note: os95 dropped because of collinearity
note: oh95 dropped because of collinearity
note: om95 dropped because of collinearity
note: ep95 dropped because of collinearity
note: ep00 dropped because of collinearity
note: ecf95 dropped because of collinearity
note: ecf00 dropped because of collinearity
note: esf dropped because of collinearity

Iteration 0:   log likelihood = -16695.577
Iteration 1:   log likelihood = -15325.608
Iteration 2:   log likelihood = -15307.453
Iteration 3:   log likelihood = -15305.338
Iteration 4:   log likelihood = -15304.983
Iteration 5:   log likelihood = -15304.976
Iteration 6:   log likelihood = -15304.976

Conditional fixed-effects Poisson regression    Number of obs     =      8,372
Group variable: volume                          Number of groups  =        322

                                                Obs per group:
                                                              min =         26
                                                              avg =       26.0
                                                              max =         26

                                                Wald chi2(333)    =    2716.40
Log likelihood  = -15304.976                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip56c80 |    .4905024    .1387676      3.53    0.000      .2185228     .7624819
     ip56c81 |    .3424896    .1417864      2.42    0.016      .0645933     .6203859
     ip56c82 |    .4455635    .1405337      3.17    0.002      .1701225     .7210045
     ip56c83 |    .4608345    .1405992      3.28    0.001      .1852651     .7364039
     ip56c84 |    .4460352    .1409897      3.16    0.002      .1697004       .72237
     ip56c85 |    .4518055    .1408705      3.21    0.001      .1757045     .7279066
     ip56c86 |    .5057573    .1397815      3.62    0.000      .2317906     .7797241
     ip56c87 |     .456144    .1402088      3.25    0.001      .1813398     .7309483
     ip56c88 |     .420824     .140248      3.00    0.003       .145943      .695705
     ip56c89 |     .483857    .1384101      3.50    0.000      .2125781     .7551359
     ip56c90 |     .514329    .1369588      3.76    0.000      .2458946     .7827634
     ip56c91 |    .3966416    .1378673      2.88    0.004      .1264266     .6668565
     ip56c92 |    .4952557    .1348395      3.67    0.000       .230975     .7595363
     ip56c93 |    .6257293    .1312909      4.77    0.000       .368404     .8830547
     ip56c94 |    .5661433    .1305713      4.34    0.000      .3102283     .8220584
     ip56c95 |    .5273125    .1294137      4.07    0.000      .2736663     .7809588
     ip56c96 |    .6141707    .1232122      4.98    0.000      .3726793     .8556621
     ip56c97 |    .7145133    .1220745      5.85    0.000      .4752516     .9537751
     ip56c98 |    .5273434     .118894      4.44    0.000      .2943155     .7603713
     ip56c99 |     .486829    .1143436      4.26    0.000      .2627196     .7109383
     ip57c80 |    .5595492      .15582      3.59    0.000      .2541475     .8649508
     ip57c81 |    .5031706     .157681      3.19    0.001      .1941215     .8122197
     ip57c82 |    .5600095    .1572375      3.56    0.000      .2518297     .8681893
     ip57c83 |    .6078601    .1568535      3.88    0.000      .3004329     .9152873
     ip57c84 |    .6413437    .1566075      4.10    0.000      .3343987     .9482888
     ip57c85 |    .7012666    .1557282      4.50    0.000       .396045     1.006488
     ip57c86 |    .6115438    .1575168      3.88    0.000      .3028165     .9202711
     ip57c87 |    .5348742    .1590618      3.36    0.001      .2231188     .8466296
     ip57c88 |    .5274689     .159024      3.32    0.001      .2157876     .8391503
     ip57c89 |    .4735087    .1598996      2.96    0.003      .1601112     .7869062
     ip57c90 |    .5694353    .1571924      3.62    0.000      .2613438     .8775268
     ip57c91 |    .5560948    .1567848      3.55    0.000      .2488022     .8633874
     ip57c92 |    .6934467    .1529802      4.53    0.000      .3936109     .9932824
     ip57c93 |    .5652609    .1546951      3.65    0.000      .2620641     .8684577
     ip57c94 |    .4861933    .1554055      3.13    0.002      .1816042     .7907824
     ip57c95 |    .7285019    .1486914      4.90    0.000      .4370722     1.019932
     ip57c96 |    .4818826    .1496486      3.22    0.001      .1885767     .7751884
     ip57c97 |    .6298292    .1472638      4.28    0.000      .3411975     .9184609
     ip57c98 |    .6071269    .1427065      4.25    0.000      .3274272     .8868265
     ip57c99 |    .4200571    .1434315      2.93    0.003      .1389365     .7011777
     ip58c80 |     .366032    .1300762      2.81    0.005      .1110873     .6209766
     ip58c81 |    .4363254    .1296115      3.37    0.001      .1822915     .6903593
     ip58c82 |    .3702546    .1309159      2.83    0.005      .1136642      .626845
     ip58c83 |    .4455096    .1301761      3.42    0.001       .190369     .7006501
     ip58c84 |    .4853649    .1298219      3.74    0.000      .2309187     .7398112
     ip58c85 |    .4354677    .1305529      3.34    0.001      .1795888     .6913466
     ip58c86 |    .5804298    .1285514      4.52    0.000      .3284736      .832386
     ip58c87 |    .4537608    .1299948      3.49    0.000      .1989758     .7085459
     ip58c88 |    .5015134    .1289546      3.89    0.000      .2487671     .7542597
     ip58c89 |    .1672521    .1337825      1.25    0.211     -.0949567     .4294609
     ip58c90 |    .3689584    .1296825      2.85    0.004      .1147853     .6231315
     ip58c91 |    .3302949    .1294656      2.55    0.011       .076547     .5840428
     ip58c92 |    .4696035     .126303      3.72    0.000      .2220542     .7171528
     ip58c93 |    .4118548    .1259957      3.27    0.001      .1649078     .6588018
     ip58c94 |    .5441943    .1227085      4.43    0.000        .30369     .7846986
     ip58c95 |    .4278375    .1229171      3.48    0.001      .1869244     .6687507
     ip58c96 |    .2721052    .1211849      2.25    0.025      .0345872     .5096231
     ip58c97 |    .4249557    .1190526      3.57    0.000      .1916168     .6582945
     ip58c98 |    .3168607    .1158073      2.74    0.006      .0898827     .5438388
     ip58c99 |    .1808961    .1145118      1.58    0.114      -.043543     .4053352
     ip59c80 |    .7139048    .1417101      5.04    0.000       .436158     .9916515
     ip59c81 |    .6985955    .1424955      4.90    0.000      .4193094     .9778815
     ip59c82 |    .4886698    .1467067      3.33    0.001      .2011298     .7762097
     ip59c83 |    .6416318    .1443714      4.44    0.000       .358669     .9245946
     ip59c84 |    .7270133    .1432721      5.07    0.000      .4462052     1.007821
     ip59c85 |    .6246354    .1452417      4.30    0.000      .3399668      .909304
     ip59c86 |     .649005    .1449033      4.48    0.000      .3649997     .9330103
     ip59c87 |    .4545039     .148695      3.06    0.002      .1630669     .7459408
     ip59c88 |    .5615031    .1463318      3.84    0.000      .2746981     .8483081
     ip59c89 |    .4466281    .1484096      3.01    0.003      .1557506     .7375055
     ip59c90 |    .3989376    .1490193      2.68    0.007       .106865     .6910101
     ip59c91 |    .4435367     .147367      3.01    0.003      .1547027     .7323707
     ip59c92 |    .3981611    .1476046      2.70    0.007      .1088614     .6874607
     ip59c93 |    .3842967    .1469622      2.61    0.009      .0962561     .6723373
     ip59c94 |    .4955137    .1432634      3.46    0.001      .2147226     .7763048
     ip59c95 |    .4853437    .1421708      3.41    0.001      .2066941     .7639934
     ip59c96 |    .3155659    .1421717      2.22    0.026      .0369146     .5942173
     ip59c97 |    .4495417    .1395239      3.22    0.001      .1760799     .7230034
     ip59c98 |    .5327894    .1333282      4.00    0.000      .2714711     .7941078
     ip59c99 |    .2765382    .1360527      2.03    0.042      .0098797     .5431967
     ip60c80 |    .4559606    .1262945      3.61    0.000      .2084278     .7034934
     ip60c81 |    .3974883    .1276339      3.11    0.002      .1473306     .6476461
     ip60c82 |    .5355837    .1262172      4.24    0.000      .2882025     .7829648
     ip60c83 |    .4867363    .1273311      3.82    0.000       .237172     .7363006
     ip60c84 |    .4538764    .1281817      3.54    0.000       .202645     .7051078
     ip60c85 |    .6150212    .1263014      4.87    0.000      .3674751     .8625673
     ip60c86 |    .4603518    .1285245      3.58    0.000      .2084483     .7122552
     ip60c87 |    .3378131    .1303886      2.59    0.010      .0822561       .59337
     ip60c88 |    .4429456    .1285816      3.44    0.001      .1909303      .694961
     ip60c89 |    .4154079    .1286007      3.23    0.001      .1633552     .6674606
     ip60c90 |    .3930155    .1283293      3.06    0.002      .1414946     .6445363
     ip60c91 |    .5182779    .1256395      4.13    0.000      .2720289     .7645268
     ip60c92 |    .5321642    .1243377      4.28    0.000      .2884668     .7758616
     ip60c93 |    .5267823    .1230359      4.28    0.000      .2856365     .7679282
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ia2journal37 |   -.0008884    .0012762     -0.70    0.486     -.0033898     .0016129
ia2journal38 |    .0004867    .0004576      1.06    0.288     -.0004102     .0013836
ia2journal39 |   -.0004591    .0011008     -0.42    0.677     -.0026166     .0016985
        op00 |     .163896    .0516429      3.17    0.002      .0626777     .2651143
        os00 |    .1868884    .0771574      2.42    0.015      .0356627     .3381142
        oh00 |    .1381577    .0755459      1.83    0.067     -.0099096      .286225
        om00 |    .1559296    .0993055      1.57    0.116     -.0387056     .3505648
        jp95 |    .1015166    .0332581      3.05    0.002      .0363318     .1667014
        jp00 |    .0179741    .0445445      0.40    0.687     -.0693315     .1052797
        jsfs |    .0188654    .0043326      4.35    0.000      .0103737     .0273571
        jsfp |    .0115347    .0048647      2.37    0.018      .0020001     .0210693
        jsfd |    .0148212    .0053541      2.77    0.006      .0043274     .0253149
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip56c80 |    1.633136    .4215096      1.90    0.057      .9847565      2.70842
     ip56c81 |     1.40845    .3773642      1.28    0.201      .8330671     2.381237
     ip56c82 |     1.56137     .410935      1.69    0.090      .9321355     2.615366
     ip56c83 |    1.585396    .4023799      1.82    0.069        .96405     2.607211
     ip56c84 |    1.562106    .3887107      1.79    0.073      .9591791     2.544026
     ip56c85 |    1.571146    .4640978      1.53    0.126      .8806066     2.803182
     ip56c86 |    1.658241    .5045647      1.66    0.096      .9133695      3.01057
     ip56c87 |    1.577978    .4519392      1.59    0.111      .9001466     2.766231
     ip56c88 |    1.523216    .4285675      1.50    0.135      .8775463     2.643949
     ip56c89 |     1.62232    .4452808      1.76    0.078      .9473396     2.778223
     ip56c90 |    1.672516    .4144175      2.08    0.038      1.029103     2.718202
     ip56c91 |    1.486823    .3599409      1.64    0.101      .9251117     2.389595
     ip56c92 |    1.640918    .3998188      2.03    0.042      1.017857     2.645372
     ip56c93 |    1.869609     .381355      3.07    0.002      1.253506      2.78853
     ip56c94 |    1.761461    .3726657      2.68    0.007      1.163556     2.666604
     ip56c95 |    1.694373    .3009564      2.97    0.003      1.196238     2.399939
     ip56c96 |    1.848123    .3636294      3.12    0.002      1.256759     2.717753
     ip56c97 |    2.043192     .370428      3.94    0.000      1.432147     2.914948
     ip56c98 |    1.694425    .3013782      2.96    0.003      1.195704     2.401159
     ip56c99 |    1.627148    .2222093      3.56    0.000      1.245042     2.126524
     ip57c80 |    1.749883    .3712395      2.64    0.008      1.154585     2.652115
     ip57c81 |    1.653957    .4384734      1.90    0.058      .9837073     2.780882
     ip57c82 |    1.750689    .5033595      1.95    0.051      .9964853     3.075722
     ip57c83 |    1.836497    .4661954      2.39    0.017      1.116638     3.020425
     ip57c84 |    1.899031    .4495901      2.71    0.007      1.194023      3.02031
     ip57c85 |    2.016305     .465851      3.04    0.002      1.282015      3.17117
     ip57c86 |    1.843275    .4383288      2.57    0.010      1.156579     2.937683
     ip57c87 |    1.707233    .4591957      1.99    0.047      1.007731     2.892285
     ip57c88 |    1.694638    .3743337      2.39    0.017      1.099138     2.612771
     ip57c89 |    1.605618    .3653342      2.08    0.037      1.027931     2.507958
     ip57c90 |    1.767269    .4607986      2.18    0.029      1.060132     2.946086
     ip57c91 |    1.743849    .3273633      2.96    0.003      1.207028     2.519419
     ip57c92 |    2.000599    .3892621      3.56    0.000      1.366279     2.929414
     ip57c93 |    1.759907    .3509978      2.83    0.005      1.190488     2.601682
     ip57c94 |    1.626114    .2835551      2.79    0.005      1.155373     2.288654
     ip57c95 |    2.071974    .3758961      4.02    0.000      1.451978      2.95671
     ip57c96 |     1.61912    .2549764      3.06    0.002       1.18914     2.204575
     ip57c97 |     1.87729     .301152      3.93    0.000      1.370828     2.570868
     ip57c98 |    1.835151     .292647      3.81    0.000      1.342557     2.508481
     ip57c99 |    1.522048    .2398919      2.67    0.008      1.117557     2.072943
     ip58c80 |    1.442001    .3398193      1.55    0.120      .9086008     2.288538
     ip58c81 |    1.547012     .357238      1.89    0.059      .9838598     2.432508
     ip58c82 |    1.448103    .3461168      1.55    0.121       .906464     2.313388
     ip58c83 |    1.561286     .376984      1.85    0.065      .9726428     2.506174
     ip58c84 |    1.624768    .3280522      2.40    0.016      1.093774     2.413543
     ip58c85 |    1.545686    .3891026      1.73    0.084      .9437225     2.531617
     ip58c86 |    1.786806    .4373221      2.37    0.018      1.105975     2.886753
     ip58c87 |    1.574221    .3422622      2.09    0.037      1.028017     2.410634
     ip58c88 |    1.651218    .3779184      2.19    0.028      1.054358     2.585956
     ip58c89 |    1.182052    .2874049      0.69    0.492      .7339645     1.903699
     ip58c90 |    1.446227    .3278084      1.63    0.104       .927469     2.255141
     ip58c91 |    1.391378    .2645993      1.74    0.082      .9584551     2.019848
     ip58c92 |     1.59936    .3029005      2.48    0.013      1.103414     2.318217
     ip58c93 |    1.509615    .3534839      1.76    0.079      .9540106     2.388797
     ip58c94 |     1.72322    .3640106      2.58    0.010      1.139027     2.607037
     ip58c95 |    1.533937    .2902806      2.26    0.024      1.058588     2.222736
     ip58c96 |    1.312725     .231613      1.54    0.123       .928946     1.855056
     ip58c97 |    1.529523    .2982088      2.18    0.029      1.043755     2.241369
     ip58c98 |    1.372811    .2164401      2.01    0.044       1.00788     1.869877
     ip58c99 |    1.198291    .2141153      1.01    0.311      .8442404      1.70082
     ip59c80 |    2.041949    .4582978      3.18    0.001      1.315225     3.170222
     ip59c81 |    2.010926    .4660936      3.01    0.003      1.276745     3.167292
     ip59c82 |    1.630146     .414608      1.92    0.055      .9902247      2.68361
     ip59c83 |    1.899578    .4504208      2.71    0.007      1.193503     3.023367
     ip59c84 |    2.068892    .3761451      4.00    0.000      1.448708     2.954573
     ip59c85 |    1.867565    .3728803      3.13    0.002      1.262769     2.762025
     ip59c86 |    1.913636    .3654137      3.40    0.001      1.316195     2.782265
     ip59c87 |    1.575392    .3352914      2.14    0.033      1.038071     2.390838
     ip59c88 |    1.753306    .4051256      2.43    0.015      1.114746     2.757653
     ip59c89 |    1.563033    .3693551      1.89    0.059      .9836113     2.483778
     ip59c90 |    1.490241    .3105676      1.91    0.056      .9905244     2.242062
     ip59c91 |    1.558208    .3096308      2.23    0.026      1.055562     2.300209
     ip59c92 |    1.489084    .2933066      2.02    0.043      1.012178     2.190692
     ip59c93 |    1.468581    .3044696      1.85    0.064      .9781937     2.204809
     ip59c94 |    1.641341    .3645101      2.23    0.026      1.062095     2.536497
     ip59c95 |    1.624733    .3167525      2.49    0.013      1.108753     2.380836
     ip59c96 |    1.371035    .2395796      1.81    0.071      .9734341     1.931037
     ip59c97 |    1.567594    .2370709      2.97    0.003      1.165478     2.108447
     ip59c98 |    1.703678    .3244138      2.80    0.005      1.173011     2.474418
     ip59c99 |    1.318557    .2055155      1.77    0.076      .9714655      1.78966
     ip60c80 |    1.577688    .3210284      2.24    0.025      1.058811     2.350844
     ip60c81 |    1.488082    .2593694      2.28    0.023      1.057461     2.094062
     ip60c82 |    1.708445    .3248893      2.82    0.005      1.176876     2.480111
     ip60c83 |    1.626998    .3014894      2.63    0.009      1.131503     2.339473
     ip60c84 |    1.574403    .2845312      2.51    0.012      1.104801     2.243613
     ip60c85 |    1.849696    .2802998      4.06    0.000      1.374392     2.489373
     ip60c86 |    1.584631    .2515165      2.90    0.004      1.160977     2.162883
     ip60c87 |    1.401878    .2737428      1.73    0.084      .9560871     2.055527
     ip60c88 |    1.557288    .2500348      2.76    0.006      1.136846     2.133222
     ip60c89 |    1.514989     .242708      2.59    0.010      1.106734     2.073842
     ip60c90 |    1.481441    .2307104      2.52    0.012      1.091751     2.010228
     ip60c91 |    1.679133    .3154551      2.76    0.006      1.161908     2.426602
     ip60c92 |    1.702613    .3259302      2.78    0.005       1.16996      2.47777
     ip60c93 |    1.693474    .4146291      2.15    0.031      1.048024     2.736442
     ip60c94 |    1.738052    .4197766      2.29    0.022      1.082629     2.790269
     ip60c95 |    1.778032    .3291138      3.11    0.002      1.237035     2.555625
     ip60c96 |    1.884193     .374006      3.19    0.001      1.276923     2.780264
     ip60c97 |    1.627414    .2989795      2.65    0.008      1.135324     2.332792
     ip60c98 |    1.773055     .298847      3.40    0.001      1.274245     2.467127
     ip60c99 |    1.696877    .2188039      4.10    0.000       1.31793     2.184785
     ip61c80 |    1.339388    .3170036      1.23    0.217      .8422593     2.129939
     ip61c81 |    1.308846    .3096899      1.14    0.255      .8231577     2.081104
     ip61c82 |    1.392449    .3056942      1.51    0.132      .9055428     2.141162
     ip61c83 |    1.492848    .3397645      1.76    0.078      .9556224     2.332086
     ip61c84 |    1.581215    .3820036      1.90    0.058       .984805     2.538818
     ip61c85 |    1.617164    .3131623      2.48    0.013      1.106419     2.363679
     ip61c86 |     1.74306    .3653814      2.65    0.008        1.1558     2.628704
     ip61c87 |    1.445823    .2617945      2.04    0.042      1.013884     2.061777
     ip61c88 |    1.564826    .3141162      2.23    0.026      1.055844     2.319169
     ip61c89 |     1.62324    .3166708      2.48    0.013      1.107453     2.379249
     ip61c90 |    1.491646    .2702453      2.21    0.027      1.045807     2.127552
     ip61c91 |    1.633169    .3172656      2.53    0.012      1.116024      2.38995
     ip61c92 |    1.520616    .2589513      2.46    0.014      1.089094     2.123116
     ip61c93 |    1.700221    .2617076      3.45    0.001       1.25743     2.298938
     ip61c94 |    1.512338    .2876168      2.18    0.030      1.041758     2.195485
     ip61c95 |    1.594132    .2519617      2.95    0.003      1.169464     2.173009
     ip61c96 |     1.41959    .2398923      2.07    0.038      1.019345     1.976992
     ip61c97 |    1.501102    .2213901      2.75    0.006      1.124271      2.00424
     ip61c98 |    1.433375    .2200048      2.35    0.019       1.06099     1.936459
     ip61c99 |    1.296308    .1643825      2.05    0.041      1.011041     1.662064
     ip62c80 |    1.777122    .3978643      2.57    0.010      1.145906     2.756039
     ip62c81 |    1.568676    .2863539      2.47    0.014      1.096859     2.243447
     ip62c82 |    1.936131    .3826599      3.34    0.001      1.314323     2.852118
     ip62c83 |    1.703688    .3889819      2.33    0.020      1.089045     2.665228
     ip62c84 |    2.003893    .4256526      3.27    0.001      1.321504      3.03865
     ip62c85 |    1.849684     .385946      2.95    0.003      1.228825      2.78423
     ip62c86 |    1.784524    .3758123      2.75    0.006      1.181036     2.696381
     ip62c87 |    1.790401    .3597166      2.90    0.004      1.207624     2.654413
     ip62c88 |    1.646364    .3127112      2.62    0.009      1.134615     2.388931
     ip62c89 |    1.703738    .3010808      3.02    0.003      1.204982     2.408936
     ip62c90 |    1.572201    .2791368      2.55    0.011      1.110149     2.226563
     ip62c91 |    1.804476    .2904565      3.67    0.000      1.316249     2.473799
     ip62c92 |    1.506748    .2485954      2.48    0.013      1.090442     2.081991
     ip62c93 |    1.842204    .3270622      3.44    0.001      1.300819     2.608908
     ip62c94 |    1.586015    .2739986      2.67    0.008      1.130458     2.225155
     ip62c95 |    1.560797    .2751635      2.53    0.012      1.104796      2.20501
     ip62c96 |      1.5574    .2421994      2.85    0.004      1.148221     2.112395
     ip62c97 |    1.421346    .2215683      2.26    0.024      1.047151     1.929259
     ip62c98 |    1.467902    .1920952      2.93    0.003       1.13581     1.897093
     ip62c99 |    1.376508    .1792399      2.45    0.014      1.066451      1.77671
     ip63c80 |    1.650957    .2881721      2.87    0.004      1.172626     2.324404
     ip63c81 |    1.524098     .302378      2.12    0.034      1.033086     2.248483
     ip63c82 |    1.491481    .2692976      2.21    0.027      1.046953     2.124752
     ip63c83 |    1.627987    .2772759      2.86    0.004      1.165939      2.27314
     ip63c84 |    1.589994    .2986858      2.47    0.014      1.100257     2.297717
     ip63c85 |    1.743965     .324528      2.99    0.003      1.210991     2.511509
     ip63c86 |    1.376916    .2037822      2.16    0.031      1.030221     1.840282
     ip63c87 |    1.531602    .2600796      2.51    0.012      1.098005     2.136424
     ip63c88 |    1.411938    .2189482      2.22    0.026      1.041887     1.913423
     ip63c89 |    1.311514    .2500365      1.42    0.155      .9025969      1.90569
     ip63c90 |    1.338125    .2449918      1.59    0.112      .9346597     1.915753
     ip63c91 |    1.484761    .2905006      2.02    0.043      1.011847     2.178704
     ip63c92 |    1.616827     .320168      2.43    0.015      1.096748      2.38353
     ip63c93 |     1.28739    .1688365      1.93    0.054      .9955844     1.664723
     ip63c94 |    1.406866    .2034009      2.36    0.018      1.059713     1.867743
     ip63c95 |    1.280216    .2061303      1.53    0.125      .9337478     1.755242
     ip63c96 |    1.513465    .2274247      2.76    0.006      1.127365     2.031797
     ip63c97 |    1.432793    .2489174      2.07    0.038      1.019307      2.01401
     ip63c98 |     1.41947    .2085299      2.38    0.017      1.064336       1.8931
     ip63c99 |    1.427011    .1864228      2.72    0.006      1.104657     1.843432
     ip64c80 |    1.751471    .3708522      2.65    0.008      1.156569     2.652371
     ip64c81 |    1.697359    .3624514      2.48    0.013      1.116887     2.579514
     ip64c82 |    1.718752    .3442095      2.70    0.007      1.160769      2.54496
     ip64c83 |     2.09679    .4471309      3.47    0.001      1.380512     3.184709
     ip64c84 |    1.968196    .3746202      3.56    0.000      1.355356     2.858139
     ip64c85 |    2.052604    .3983001      3.71    0.000      1.403242     3.002462
     ip64c86 |    1.804574    .3568567      2.99    0.003      1.224753     2.658893
     ip64c87 |    1.835987    .3763919      2.96    0.003      1.228476     2.743928
     ip64c88 |    1.624198    .2989468      2.64    0.008      1.132318     2.329751
     ip64c89 |    1.487304    .2564332      2.30    0.021      1.060816     2.085257
     ip64c90 |    1.854839    .3802423      3.01    0.003      1.241109      2.77206
     ip64c91 |    1.814151    .3408424      3.17    0.002      1.255307     2.621785
     ip64c92 |    1.550127    .2849834      2.38    0.017       1.08113     2.222576
     ip64c93 |    1.365097    .2240533      1.90    0.058       .989591      1.88309
     ip64c94 |    1.587558    .2659794      2.76    0.006      1.143192     2.204651
     ip64c95 |     1.59202    .2758081      2.68    0.007       1.13366     2.235704
     ip64c96 |     1.57221    .2367767      3.00    0.003      1.170358     2.112042
     ip64c97 |    1.552013    .2359908      2.89    0.004      1.152037     2.090858
     ip64c98 |    1.435485    .2376225      2.18    0.029      1.037756     1.985647
     ip64c99 |    1.486058    .2308302      2.55    0.011      1.096019     2.014899
     ip65c80 |    1.637241    .3064767      2.63    0.008      1.134424     2.362925
     ip65c81 |    1.681329    .3136745      2.79    0.005      1.166405     2.423571
     ip65c82 |    1.665814    .3247301      2.62    0.009      1.136829     2.440944
     ip65c83 |    1.652632    .3355628      2.47    0.013      1.110048     2.460427
     ip65c84 |     1.66252    .3355912      2.52    0.012      1.119298     2.469379
     ip65c85 |    1.714782    .3432055      2.69    0.007      1.158364     2.538475
     ip65c86 |    1.633544    .3273887      2.45    0.014        1.1029     2.419499
     ip65c87 |    1.691934    .3163652      2.81    0.005      1.172794      2.44087
     ip65c88 |     1.50464    .3076055      2.00    0.046      1.007894      2.24621
     ip65c89 |    1.711265    .4033423      2.28    0.023      1.078178     2.716089
     ip65c90 |    1.828018    .3717235      2.97    0.003       1.22713     2.723143
     ip65c91 |    1.547667    .2774379      2.44    0.015      1.089154     2.199204
     ip65c92 |     1.67699    .3378274      2.57    0.010      1.129944      2.48888
     ip65c93 |    1.626424    .3125594      2.53    0.011      1.115972     2.370359
     ip65c94 |    1.514485    .2849208      2.21    0.027      1.047437     2.189788
     ip65c95 |    1.598799    .2917659      2.57    0.010       1.11804     2.286284
     ip65c96 |     1.51614    .2591507      2.43    0.015      1.084539     2.119501
     ip65c97 |    1.524852     .281939      2.28    0.023      1.061314     2.190844
     ip65c98 |    1.456111    .2463054      2.22    0.026      1.045228     2.028512
     ip65c99 |    1.503306    .2241944      2.73    0.006      1.122287     2.013681
     ip56c00 |     1.89251    .2769726      4.36    0.000      1.420571     2.521234
     ip56c01 |    1.662353    .1987013      4.25    0.000      1.315162     2.101201
     ip56c02 |    1.682422    .1803698      4.85    0.000      1.363575     2.075826
     ip56c03 |     1.39548    .1554333      2.99    0.003      1.121796     1.735934
     ip56c04 |    1.319221    .1367546      2.67    0.008      1.076662     1.616426
     ip57c00 |    1.764388    .3004569      3.33    0.001      1.263698     2.463456
     ip57c01 |    1.445627    .1623398      3.28    0.001      1.160029      1.80154
     ip57c02 |    1.477146    .1821869      3.16    0.002      1.159949     1.881084
     ip57c03 |     1.60629    .1864259      4.08    0.000       1.27948     2.016575
     ip57c04 |    1.273167    .1449609      2.12    0.034      1.018519     1.591483
     ip58c00 |    1.295041    .2166119      1.55    0.122      .9330593     1.797453
     ip58c01 |    1.501995    .2170215      2.82    0.005      1.131564     1.993689
     ip58c02 |    1.084266    .1165522      0.75    0.452      .8782875     1.338551
     ip58c03 |    1.162704    .1182619      1.48    0.138      .9525568     1.419211
     ip58c04 |    1.131138    .0927522      1.50    0.133      .9632036     1.328353
     ip59c00 |    1.148601    .1353954      1.18    0.240      .9116553      1.44713
     ip59c01 |    1.383368    .1755557      2.56    0.011      1.078739     1.774023
     ip59c02 |    1.230476     .174123      1.47    0.143      .9324394     1.623773
     ip59c03 |    1.240485    .1697315      1.58    0.115        .94869     1.622029
     ip59c04 |    1.098461    .0616835      1.67    0.094      .9839795     1.226263
     ip60c00 |    1.366172    .1928087      2.21    0.027      1.036036     1.801508
     ip60c01 |    1.387071    .1635634      2.77    0.006      1.100842     1.747722
     ip60c02 |    1.384778    .1366321      3.30    0.001      1.141286     1.680219
     ip60c03 |    1.297512    .1551024      2.18    0.029      1.026503     1.640071
     ip60c04 |    1.231709    .0892986      2.87    0.004      1.068554     1.419777
     ip61c00 |    1.455156    .1635117      3.34    0.001      1.167515     1.813663
     ip61c01 |    1.315215    .1183019      3.05    0.002      1.102636     1.568777
     ip61c02 |    1.256061    .0874298      3.28    0.001      1.095877     1.439659
     ip61c03 |    1.293209    .0998565      3.33    0.001      1.111584      1.50451
     ip61c04 |    1.178811    .0847387      2.29    0.022      1.023895     1.357165
     ip62c00 |    1.365953     .178068      2.39    0.017      1.057965     1.763599
     ip62c01 |    1.515307    .1578548      3.99    0.000      1.235458     1.858546
     ip62c02 |    1.298964    .0988222      3.44    0.001      1.119025     1.507838
     ip62c03 |    1.199995    .0688241      3.18    0.001      1.072408     1.342762
     ip62c04 |    1.285956    .1020025      3.17    0.002        1.1008     1.502255
     ip63c00 |    1.396079     .188869      2.47    0.014      1.070915     1.819974
     ip63c01 |    1.470185    .1765542      3.21    0.001      1.161853     1.860341
     ip63c02 |    1.373579    .1747208      2.50    0.013      1.070483     1.762493
     ip63c03 |    1.327288    .1709047      2.20    0.028      1.031247     1.708315
     ip63c04 |    1.206324    .0817946      2.77    0.006      1.056205     1.377779
     ip64c00 |    1.419041    .1991421      2.49    0.013      1.077807      1.86831
     ip64c01 |    1.346655    .1469008      2.73    0.006      1.087433     1.667671
     ip64c02 |    1.332023    .1177945      3.24    0.001       1.12005     1.584111
     ip64c03 |    1.260989    .0976574      2.99    0.003      1.083403     1.467684
     ip64c04 |    1.192686    .0658661      3.19    0.001      1.070332     1.329027
     ip65c00 |    1.404057    .2005593      2.38    0.018      1.061199     1.857688
     ip65c01 |    1.282036    .1653708      1.93    0.054      .9956416     1.650811
     ip65c02 |    1.169384    .1262596      1.45    0.147      .9463505     1.444981
     ip65c03 |    1.172768    .1101503      1.70    0.090      .9755834     1.409807
     ip65c04 |    1.063173    .0782059      0.83    0.405      .9204294     1.228054
 ia1journal2 |    .9340026     .007959     -8.01    0.000      .9185328     .9497329
 ia1journal3 |    .8785518    .0135074     -8.42    0.000      .8524726     .9054288
 ia1journal4 |    .9107206    .0072355    -11.77    0.000      .8966492     .9250129
 ia1journal5 |    .9167181    .0107247     -7.43    0.000      .8959373     .9379809
 ia1journal6 |    .8860263    .0053323    -20.11    0.000      .8756366     .8965394
 ia1journal7 |    .9791446    .0052723     -3.91    0.000      .9688655     .9895328
 ia1journal8 |    .9861238    .0060094     -2.29    0.022      .9744156     .9979727
 ia1journal9 |    .9532637    .0141189     -3.23    0.001       .925989     .9813418
ia1journal10 |    .8068726    .0177029     -9.78    0.000       .772911     .8423264
ia1journal11 |    1.063703    .0088275      7.44    0.000      1.046541     1.081146
ia1journal12 |    .9642417     .005428     -6.47    0.000      .9536616     .9749393
ia1journal13 |    .9415492    .0058456     -9.70    0.000      .9301614     .9530764
ia1journal14 |    1.036875    .0113133      3.32    0.001      1.014937     1.059287
ia1journal15 |    1.016796    .0080003      2.12    0.034      1.001236     1.032598
ia1journal16 |    .9647243     .017245     -2.01    0.045        .93151     .9991229
ia1journal17 |    .9018728    .0095306     -9.77    0.000      .8833854     .9207472
ia1journal18 |    .9549396    .0122219     -3.60    0.000      .9312831     .9791971
ia1journal19 |    .6653399    .0109887    -24.67    0.000      .6441472     .6872298
ia1journal20 |    .9639905    .0096894     -3.65    0.000      .9451854     .9831697
ia1journal21 |    1.021019    .0087736      2.42    0.015      1.003967      1.03836
ia1journal22 |    1.059181    .0203178      3.00    0.003      1.020099     1.099762
ia1journal23 |    .7989784    .0121441    -14.76    0.000      .7755274     .8231385
ia1journal24 |    .7726475    .0243563     -8.18    0.000      .7263549     .8218906
ia1journal26 |    .9554624    .0192679     -2.26    0.024      .9184346     .9939829
ia1journal27 |    .8658911    .0111011    -11.23    0.000      .8444044     .8879245
ia1journal28 |    .9340134    .0163148     -3.91    0.000      .9025781     .9665434
ia1journal29 |    .8902491    .0142549     -7.26    0.000      .8627438     .9186313
ia1journal30 |    1.033294        .043      0.79    0.431      .9523608     1.121105
ia1journal31 |    .9445881    .0138211     -3.90    0.000       .917884     .9720692
ia1journal32 |    .8281069    .0207362     -7.53    0.000       .788446     .8697629
ia1journal33 |    1.059844    .0185744      3.32    0.001      1.024057     1.096882
ia1journal34 |    .9148384    .0099049     -8.22    0.000      .8956297     .9344592
ia1journal35 |    1.457485    .0284345     19.31    0.000      1.402806     1.514295
ia1journal36 |    .8682257     .020108     -6.10    0.000      .8296959     .9085448
ia1journal37 |    1.026058     .012428      2.12    0.034      1.001986     1.050707
ia1journal38 |    .9440337    .0103329     -5.26    0.000      .9239973     .9645046
ia1journal39 |    1.027602    .0180833      1.55    0.122      .9927637     1.063663
 ia2journal2 |    1.000817    .0001272      6.42    0.000      1.000568     1.001066
 ia2journal3 |     1.00214    .0002816      7.61    0.000      1.001588     1.002692
 ia2journal4 |    1.001339    .0001569      8.54    0.000      1.001031     1.001646
 ia2journal5 |    1.001375    .0002152      6.39    0.000      1.000953     1.001797
 ia2journal6 |    1.001359    .0001007     13.49    0.000      1.001161     1.001556
 ia2journal7 |    1.000239     .000107      2.23    0.026      1.000029     1.000449
 ia2journal8 |    1.000154    .0001072      1.44    0.151      .9999439     1.000364
 ia2journal9 |    1.000964    .0002713      3.56    0.000      1.000433     1.001496
ia2journal10 |    1.003917    .0003672     10.69    0.000      1.003198     1.004637
ia2journal11 |    .9993726    .0001521     -4.12    0.000      .9990745     .9996708
ia2journal12 |     .999937    .0001143     -0.55    0.581      .9997129     1.000161
ia2journal13 |    1.000792    .0001252      6.33    0.000      1.000547     1.001038
ia2journal14 |    .9994669    .0001908     -2.79    0.005       .999093      .999841
ia2journal15 |    .9990902    .0001395     -6.52    0.000      .9988168     .9993637
ia2journal16 |    1.000563    .0003547      1.59    0.113      .9998677     1.001258
ia2journal17 |    1.001154     .000219      5.27    0.000      1.000725     1.001583
ia2journal18 |    1.000369     .000245      1.51    0.132      .9998892      1.00085
ia2journal19 |    1.007451    .0003167     23.61    0.000       1.00683     1.008071
ia2journal20 |    1.000738    .0002162      3.41    0.001      1.000314     1.001162
ia2journal21 |    .9992241    .0001659     -4.68    0.000      .9988991     .9995493
ia2journal22 |    .9990906    .0003647     -2.49    0.013      .9983761     .9998056
ia2journal23 |    1.003836    .0003164     12.15    0.000      1.003216     1.004456
ia2journal24 |    1.002777     .000531      5.24    0.000      1.001737     1.003818
ia2journal26 |    1.000099    .0004175      0.24    0.813      .9992807     1.000917
ia2journal27 |     1.00238    .0002784      8.56    0.000      1.001834     1.002925
ia2journal28 |    1.000757     .000339      2.23    0.026      1.000093     1.001422
ia2journal29 |    1.001374    .0003306      4.16    0.000      1.000727     1.002023
ia2journal30 |    1.000225    .0006519      0.35    0.730      .9989479     1.001503
ia2journal31 |    1.000789    .0003151      2.51    0.012      1.000172     1.001407
ia2journal32 |    1.003144    .0005424      5.80    0.000      1.002081     1.004207
ia2journal33 |    .9982894    .0003476     -4.92    0.000      .9976083      .998971
ia2journal34 |    1.000865    .0002284      3.79    0.000      1.000418     1.001313
ia2journal35 |    .9862857    .0003686    -36.95    0.000      .9855635     .9870085
ia2journal36 |     1.00125    .0004217      2.97    0.003      1.000424     1.002077
ia2journal37 |    .9991119    .0002522     -3.52    0.000      .9986178     .9996063
ia2journal38 |    1.000487    .0002357      2.07    0.039      1.000025     1.000949
ia2journal39 |     .999541    .0003441     -1.33    0.182      .9988668     1.000216
        op00 |    1.178092    .1021836      1.89    0.059      .9939141     1.396399
        os00 |    1.205493    .1466041      1.54    0.124      .9498325     1.529967
        oh00 |    1.148157    .1222804      1.30    0.195      .9318518     1.414671
        om00 |    1.168744     .136168      1.34    0.181      .9301385     1.468558
        jp95 |    1.106848     .052113      2.16    0.031       1.00928     1.213849
        jp00 |    1.018137    .0469988      0.39    0.697      .9300649     1.114548
        jsfs |    1.019044    .0080589      2.39    0.017      1.003371     1.034963
        jsfp |    1.011601    .0103464      1.13    0.259      .9915248     1.032085
        jsfd |    1.014932    .0095588      1.57    0.116      .9963685      1.03384
-------------+----------------------------------------------------------------
Wald chi2(333) = -2.5e+16                                Prob > chi2 =   1.0000

. * Stats for elasticities;
. summ jsfs if jsfs > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfs |        923      8.9452    5.413599        .31      18.98

. summ jsfp if jsfp > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfp |        104    10.76702    6.775269        .46      18.98

. summ jsfd if jsfd > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfd |        213    9.287042     6.56018        .46      18.98

. summ esf  if esf  > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
         esf |          0

. **********************************************************************;
. *** 1966-1975                                                      ***;
. **********************************************************************;
. clear;

. use temp_data_subs;

. gen plower = 1966;

. gen pupper = 1975;

. keep if pyear >= plower & pyear <= pupper;
(47,947 observations deleted)

. * Create fixed effects for publication x citation year interactions;
. * Drop the 2005 cyear to avoid multicolinearity with the constant;
. * Don't create variables with pyear after cyear;
. * Do create variables with pyear = cyear since keeping age0 = 1 observations;
. forvalues y = 56/99 {;
  2.    forvalues x = 80/99 {;
  3.       quietly gen ip`y'c`x' = py19`y' * c`x' if
>          (`x' >= `y')
>        & (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 56/99 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip`y'c0`x' = py19`y' * c0`x' if
>          (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 0/5 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip0`y'c0`x' = py200`y' * c0`x' if
>          (`x' >= `y')
>        & (2000 + `y' >= plower)
>        & (2000 + `y' <= pupper);
  4.    };
  5. };

. foreach var of varlist ip* {;
  2.    capture assert !missing(`var');
  3.    if _rc {;
  4.       drop `var';
  5.    };
  6. };

. egen title = group(journal);

. rename journal smournal;

. quietly tabulate title, generate(journal);

. drop title;

. foreach var of varlist journal* {;
  2.    quietly gen ia1`var' = age * `var';
  3.    quietly gen ia2`var' = age2 * `var';
  4.    quietly gen ia3`var' = age3 * `var';
  5.    quietly gen ia4`var' = age4 * `var';
  6. };

. rename smournal journal;

. * avoid multicolinearity by dropping first journal's age profile;
.  drop ia1journal1 ia2journal1 ia3journal1 ia4journal1;

.  * screen for small numbers within digitization categories;
. foreach var in op95 op00 os95 os00 oh95 oh00 om95 om00
>                jp95 jp00
>                ep95 ep00 ecf95 ecf00
>                jsfs_dum jsfp_dum jsfd_dum esf_dum {;
  2.    quietly egen countvar = total(`var' > 0);
  3.    drop if (countvar <= threshold) & (`var' > 0);
  4.    drop countvar;
  5.    };
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)

. * apply second screen to pick up newly created small categories;
. foreach var in op95 op00 os95 os00 oh95 oh00 om95 om00
>                jp95 jp00
>                ep95 ep00 ecf95 ecf00
>                jsfs_dum jsfp_dum jsfd_dum esf_dum {;
  2.    quietly egen countvar = total(`var' > 0);
  3.    drop if (countvar <= threshold) & (`var' > 0);
  4.    drop countvar;
  5.    };
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)

. * Run regression;
. xtpqml cit ip* ia1j* ia2j*
>            op95 op00 os95 os00 oh95 oh00 om95 om00
>            jp95 jp00
>            ep95 ep00 ecf95 ecf00
>            jsfs jsfp jsfd esf,
>            i(volume) irr fe cluster(journal);
note: 13 groups (338 obs) dropped because of all zero outcomes
note: op95 dropped because of collinearity
note: os95 dropped because of collinearity
note: oh95 dropped because of collinearity
note: om95 dropped because of collinearity
note: ep95 dropped because of collinearity
note: ecf95 dropped because of collinearity
note: ecf00 dropped because of collinearity

Iteration 0:   log likelihood = -35747.421
Iteration 1:   log likelihood = -28283.086
Iteration 2:   log likelihood = -28117.203
Iteration 3:   log likelihood = -28113.587
Iteration 4:   log likelihood = -28113.069
Iteration 5:   log likelihood = -28113.065
Iteration 6:   log likelihood = -28113.065

Conditional fixed-effects Poisson regression    Number of obs     =     12,168
Group variable: volume                          Number of groups  =        468

                                                Obs per group:
                                                              min =         26
                                                              avg =       26.0
                                                              max =         26

                                                Wald chi2(377)    =   14786.31
Log likelihood  = -28113.065                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip66c80 |    .8623178    .0911872      9.46    0.000      .6835943     1.041041
     ip66c81 |    .7770737    .0922447      8.42    0.000      .5962775     .9578699
     ip66c82 |    .7808732    .0922677      8.46    0.000      .6000318     .9617146
     ip66c83 |     .721422    .0929795      7.76    0.000      .5391855     .9036586
     ip66c84 |    .6627431     .093662      7.08    0.000       .479169     .8463172
     ip66c85 |    .6962667    .0931442      7.48    0.000      .5137074     .8788259
     ip66c86 |    .5986248    .0942357      6.35    0.000      .4139263     .7833234
     ip66c87 |    .6927679    .0928057      7.46    0.000      .5108721     .8746636
     ip66c88 |    .5350526    .0946073      5.66    0.000      .3496257     .7204796
     ip66c89 |    .4197349    .0959801      4.37    0.000      .2316174     .6078525
     ip66c90 |    .5116007    .0942017      5.43    0.000      .3269687     .6962328
     ip66c91 |    .3720602     .095892      3.88    0.000      .1841154      .560005
     ip66c92 |    .3311971    .0960672      3.45    0.001      .1429088     .5194854
     ip66c93 |    .3413145     .095346      3.58    0.000      .1544398     .5281892
     ip66c94 |    .2991574    .0954746      3.13    0.002      .1120307     .4862841
     ip66c95 |    .1943971    .0967597      2.01    0.045      .0047515     .3840427
     ip66c96 |      .25909    .0933155      2.78    0.005      .0761951     .4419849
     ip66c97 |    .2624139    .0938834      2.80    0.005      .0784058      .446422
     ip66c98 |    .1969571    .0926045      2.13    0.033      .0154556     .3784587
     ip66c99 |    .2673378    .0892662      2.99    0.003      .0923793     .4422964
     ip67c80 |    1.344029    .1073165     12.52    0.000      1.133692     1.554365
     ip67c81 |    1.320358     .107721     12.26    0.000      1.109229     1.531487
     ip67c82 |    1.258536    .1084641     11.60    0.000       1.04595     1.471122
     ip67c83 |    1.229375    .1088374     11.30    0.000      1.016058     1.442692
     ip67c84 |    1.269856    .1084248     11.71    0.000      1.057347     1.482364
     ip67c85 |    1.231379    .1087628     11.32    0.000      1.018208      1.44455
     ip67c86 |    1.046864    .1107592      9.45    0.000      .8297795     1.263948
     ip67c87 |     1.03479    .1107162      9.35    0.000      .8177903      1.25179
     ip67c88 |     .960777    .1114245      8.62    0.000       .742389     1.179165
     ip67c89 |    .8772161    .1122769      7.81    0.000      .6571574     1.097275
     ip67c90 |    .8556315    .1122051      7.63    0.000      .6357136     1.075549
     ip67c91 |     .776531    .1129882      6.87    0.000      .5550782     .9979838
     ip67c92 |     .690308    .1139387      6.06    0.000      .4669924     .9136237
     ip67c93 |    .8089866    .1113899      7.26    0.000      .5906665     1.027307
     ip67c94 |    .6613419    .1133052      5.84    0.000      .4392679      .883416
     ip67c95 |    .6165667    .1135051      5.43    0.000      .3941008     .8390327
     ip67c96 |    .6834496    .1105274      6.18    0.000      .4668199     .9000793
     ip67c97 |    .7049512    .1103661      6.39    0.000      .4886376     .9212648
     ip67c98 |    .6120927    .1103643      5.55    0.000      .3957827     .8284028
     ip67c99 |    .6719202    .1075025      6.25    0.000      .4612192     .8826213
     ip68c80 |    .7685706    .0804443      9.55    0.000      .6109028     .9262385
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ia1journal16 |   -.0966136      .03913     -2.47    0.014      -.173307    -.0199203
ia1journal17 |    .0126969    .0097842      1.30    0.194     -.0064798     .0318736
ia1journal18 |   -.1029681    .0190004     -5.42    0.000     -.1402082     -.065728
ia1journal19 |    .0693568    .0120581      5.75    0.000      .0457233     .0929902
ia1journal20 |    .0186558    .0074767      2.50    0.013      .0040017     .0333099
ia1journal21 |    .0107071    .0234219      0.46    0.648      -.035199     .0566132
ia1journal22 |   -.0456565    .0306247     -1.49    0.136     -.1056798     .0143668
ia1journal23 |   -.0574125    .0184456     -3.11    0.002     -.0935652    -.0212599
ia1journal24 |    .0306482    .0072996      4.20    0.000      .0163414     .0449551
ia1journal25 |   -.0139606    .0166134     -0.84    0.401     -.0465223     .0186012
ia1journal26 |   -.0183886    .0145058     -1.27    0.205     -.0468194     .0100422
ia1journal27 |   -.0635679    .0180931     -3.51    0.000     -.0990297     -.028106
ia1journal28 |    .0173152    .0224469      0.77    0.440     -.0266799     .0613104
ia1journal29 |    .1036104    .0634518      1.63    0.102     -.0207529     .2279736
ia1journal30 |    .1337426    .0251421      5.32    0.000       .084465     .1830202
ia1journal31 |   -.0740449    .0868973     -0.85    0.394     -.2443606     .0962707
ia1journal32 |   -.0147292    .0243691     -0.60    0.546     -.0624917     .0330333
ia1journal33 |   -.0184133    .0306895     -0.60    0.549     -.0785637     .0417371
ia1journal34 |    .0786478    .0270812      2.90    0.004      .0255697     .1317259
ia1journal35 |    .0023403    .0301807      0.08    0.938     -.0568128     .0614935
ia1journal36 |     -.47768    .0835638     -5.72    0.000     -.6414621     -.313898
ia1journal37 |   -.0042073    .0107897     -0.39    0.697     -.0253548     .0169401
ia1journal38 |   -.0187387    .0255319     -0.73    0.463     -.0687804      .031303
ia1journal39 |    .0040387     .016666      0.24    0.809     -.0286262     .0367035
ia1journal40 |   -.0187458    .0365059     -0.51    0.608     -.0902961     .0528045
ia1journal41 |    .0129728    .0090405      1.43    0.151     -.0047463     .0306919
ia1journal42 |    .0034472    .0338775      0.10    0.919     -.0629515     .0698459
ia1journal43 |    -.000802    .0221418     -0.04    0.971      -.044199     .0425951
ia1journal44 |    .0810501    .0106731      7.59    0.000      .0601311     .1019691
ia1journal45 |    .1138903    .0308884      3.69    0.000      .0533501     .1744305
ia1journal46 |    .0238187    .0114795      2.07    0.038      .0013194     .0463181
ia1journal47 |   -.0048787     .008287     -0.59    0.556     -.0211209     .0113635
ia1journal48 |    .0154074    .0259481      0.59    0.553       -.03545     .0662648
ia1journal49 |    -.074108    .0280087     -2.65    0.008      -.129004    -.0192119
ia1journal50 |    -.091659    .0197409     -4.64    0.000     -.1303504    -.0529676
ia1journal51 |   -.0734445    .1383284     -0.53    0.595     -.3445632     .1976742
ia1journal52 |    .0961287    .0636297      1.51    0.131     -.0285832     .2208407
ia1journal53 |    -.053345    .0461996     -1.15    0.248     -.1438945     .0372046
ia1journal54 |   -.0214377    .0644025     -0.33    0.739     -.1476642     .1047888
ia1journal55 |   -.0266352    .0230034     -1.16    0.247     -.0717211     .0184506
ia1journal56 |   -.0954943    .0511405     -1.87    0.062     -.1957278     .0047391
ia1journal57 |   -.0115332    .0117023     -0.99    0.324     -.0344694      .011403
ia1journal58 |   -.0085276    .0353289     -0.24    0.809      -.077771     .0607158
ia1journal59 |    .0480316    .0236944      2.03    0.043      .0015913     .0944718
 ia2journal2 |   -.0000677    .0001565     -0.43    0.666     -.0003744     .0002391
 ia2journal3 |    .0002158    .0001912      1.13    0.259      -.000159     .0005907
 ia2journal4 |    .0009707    .0001884      5.15    0.000      .0006013       .00134
 ia2journal5 |   -.0000339    .0001365     -0.25    0.804     -.0003013     .0002336
 ia2journal6 |    -.001654    .0006674     -2.48    0.013      -.002962    -.0003459
 ia2journal7 |   -.0009004    .0003841     -2.34    0.019     -.0016533    -.0001475
 ia2journal8 |    .0008137    .0002903      2.80    0.005      .0002447     .0013826
 ia2journal9 |   -.0006447    .0001882     -3.42    0.001     -.0010136    -.0002757
ia2journal10 |   -.0011964    .0003886     -3.08    0.002     -.0019581    -.0004347
ia2journal11 |    .0006334    .0002151      2.95    0.003      .0002119      .001055
ia2journal12 |    .0001336    .0004125      0.32    0.746     -.0006749     .0009421
ia2journal13 |   -.0005742    .0002709     -2.12    0.034     -.0011053    -.0000432
ia2journal14 |   -.0026274    .0006208     -4.23    0.000     -.0038441    -.0014107
ia2journal15 |   -.0002584    .0003452     -0.75    0.454      -.000935     .0004182
ia2journal16 |    .0001998    .0011241      0.18    0.859     -.0020034     .0024031
ia2journal17 |    .0000419    .0002504      0.17    0.867      -.000449     .0005327
ia2journal18 |     .001612    .0004691      3.44    0.001      .0006926     .0025313
ia2journal19 |    -.001818    .0003217     -5.65    0.000     -.0024486    -.0011875
ia2journal20 |   -.0004629    .0001884     -2.46    0.014      -.000832    -.0000937
ia2journal21 |   -.0002767    .0005749     -0.48    0.630     -.0014034       .00085
ia2journal22 |   -.0001744    .0007817     -0.22    0.823     -.0017066     .0013578
ia2journal23 |    .0016289    .0004155      3.92    0.000      .0008146     .0024433
ia2journal24 |   -.0002761    .0001845     -1.50    0.135     -.0006376     .0000855
ia2journal25 |    .0005108    .0004717      1.08    0.279     -.0004137     .0014353
ia2journal26 |    .0004596    .0003628      1.27    0.205     -.0002514     .0011705
ia2journal27 |     .000754    .0004549      1.66    0.097     -.0001376     .0016456
ia2journal28 |   -.0010172    .0005554     -1.83    0.067     -.0021057     .0000713
ia2journal29 |   -.0020381    .0015309     -1.33    0.183     -.0050386     .0009624
ia2journal30 |   -.0031681    .0006446     -4.91    0.000     -.0044315    -.0019047
ia2journal31 |    .0019031    .0018754      1.01    0.310     -.0017727     .0055788
ia2journal32 |   -.0000297    .0007197     -0.04    0.967     -.0014404     .0013809
ia2journal33 |    .0003113    .0008177      0.38    0.703     -.0012913     .0019139
ia2journal34 |   -.0020498    .0006809     -3.01    0.003     -.0033842    -.0007153
ia2journal35 |    -.000241    .0007681     -0.31    0.754     -.0017464     .0012645
ia2journal36 |    .0088975    .0027047      3.29    0.001      .0035964     .0141985
ia2journal37 |    .0003344    .0002633      1.27    0.204     -.0001816     .0008505
ia2journal38 |    .0003135    .0006198      0.51    0.613     -.0009012     .0015282
ia2journal39 |   -.0003689      .00041     -0.90    0.368     -.0011725     .0004347
ia2journal40 |    .0006236     .000904      0.69    0.490     -.0011481     .0023953
ia2journal41 |    .0003459    .0002403      1.44    0.150     -.0001251     .0008169
ia2journal42 |    .0001447    .0009599      0.15    0.880     -.0017366      .002026
ia2journal43 |   -.0005893    .0006076     -0.97    0.332     -.0017803     .0006016
ia2journal44 |   -.0010192     .000262     -3.89    0.000     -.0015328    -.0005057
ia2journal45 |   -.0023356    .0007856     -2.97    0.003     -.0038754    -.0007957
ia2journal46 |   -.0004691    .0002896     -1.62    0.105     -.0010367     .0000985
ia2journal47 |   -.0001736    .0002119     -0.82    0.413     -.0005889     .0002418
ia2journal48 |     -.00026    .0006466     -0.40    0.688     -.0015274     .0010074
ia2journal49 |    .0013391    .0008249      1.62    0.105     -.0002777     .0029559
ia2journal50 |    .0012955    .0004881      2.65    0.008      .0003389     .0022521
ia2journal51 |   -.0063912    .0048668     -1.31    0.189     -.0159299     .0031474
ia2journal52 |   -.0022254    .0017916     -1.24    0.214     -.0057368      .001286
ia2journal53 |     .000497    .0012109      0.41    0.681     -.0018763     .0028702
ia2journal54 |   -.0018484    .0021637     -0.85    0.393     -.0060892     .0023924
ia2journal55 |    .0002962    .0005518      0.54    0.591     -.0007852     .0013777
ia2journal56 |    .0026951    .0012562      2.15    0.032      .0002331     .0051572
ia2journal57 |   -.0004862    .0003042     -1.60    0.110     -.0010824       .00011
ia2journal58 |    .0002848    .0008222      0.35    0.729     -.0013266     .0018962
ia2journal59 |   -.0008157    .0006005     -1.36    0.174     -.0019927     .0003613
        op00 |     .110901    .0288948      3.84    0.000      .0542683     .1675336
        os00 |    .1183868    .0349291      3.39    0.001       .049927     .1868465
        oh00 |    .1469182    .0413555      3.55    0.000      .0658629     .2279735
        om00 |    .2352777    .0540668      4.35    0.000      .1293087     .3412467
        jp95 |    .0733574    .0216609      3.39    0.001      .0309029     .1158119
        jp00 |    .0399066    .0265434      1.50    0.133     -.0121175     .0919307
        ep00 |    .0639302    .0572459      1.12    0.264     -.0482697     .1761302
        jsfs |    .0156889    .0028731      5.46    0.000      .0100576     .0213201
        jsfp |    .0060816    .0029014      2.10    0.036      .0003949     .0117682
        jsfd |    .0159284    .0025912      6.15    0.000      .0108498     .0210069
         esf |    .0113471    .0265088      0.43    0.669     -.0406092     .0633033
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip66c80 |    2.368644    .3622792      5.64    0.000      1.755134     3.196608
     ip66c81 |    2.175098    .3654508      4.63    0.000      1.564817      3.02339
     ip66c82 |    2.183378    .3110645      5.48    0.000      1.651425     2.886683
     ip66c83 |    2.057357      .31798      4.67    0.000      1.519672     2.785282
     ip66c84 |    1.940107    .3530486      3.64    0.000      1.358092     2.771546
     ip66c85 |    2.006249     .325018      4.30    0.000      1.460453     2.756017
     ip66c86 |    1.819615    .2823756      3.86    0.000      1.342414     2.466451
     ip66c87 |    1.999241    .3698228      3.75    0.000      1.391261     2.872909
     ip66c88 |    1.707538    .2579031      3.54    0.000      1.270009     2.295801
     ip66c89 |    1.521558    .2584074      2.47    0.013      1.090758     2.122505
     ip66c90 |    1.667959    .3112366      2.74    0.006      1.157054     2.404458
     ip66c91 |     1.45072    .2178389      2.48    0.013      1.080856      1.94715
     ip66c92 |    1.392634    .1969298      2.34    0.019      1.055529     1.837401
     ip66c93 |    1.406796    .2217937      2.16    0.030      1.032837     1.916154
     ip66c94 |    1.348722    .1673234      2.41    0.016      1.057601     1.719979
     ip66c95 |    1.214578    .1522033      1.55    0.121       .950076     1.552719
     ip66c96 |     1.29575    .1680418      2.00    0.046       1.00492     1.670748
     ip66c97 |    1.300065    .1736042      1.97    0.049       1.00069     1.689002
     ip66c98 |    1.217692    .1526553      1.57    0.116      .9524166     1.556854
     ip66c99 |    1.306482    .1651246      2.12    0.034      1.019814     1.673731
     ip67c80 |     3.83446    .7183766      7.17    0.000      2.656034     5.535728
     ip67c81 |    3.744763    .6878795      7.19    0.000      2.612559     5.367628
     ip67c82 |    3.520265    .6825736      6.49    0.000      2.407292     5.147803
     ip67c83 |    3.419092     .599922      7.01    0.000      2.424136     4.822416
     ip67c84 |    3.560339    .6043986      7.48    0.000      2.552657     4.965812
     ip67c85 |     3.42595    .6702388      6.29    0.000      2.334831     5.026974
     ip67c86 |    2.848702    .5443943      5.48    0.000      1.958756      4.14299
     ip67c87 |    2.814515     .463768      6.28    0.000      2.037722     3.887427
     ip67c88 |    2.613726    .4451053      5.64    0.000      1.871994     3.649352
     ip67c89 |    2.404197    .3937851      5.36    0.000      1.744019     3.314279
     ip67c90 |     2.35286    .3600668      5.59    0.000      1.743145     3.175839
     ip67c91 |    2.173918    .3387105      4.98    0.000      1.601845     2.950298
     ip67c92 |     1.99433     .351343      3.92    0.000      1.412017     2.816787
     ip67c93 |    2.245631    .3707971      4.90    0.000      1.624758     3.103761
     ip67c94 |     1.93739    .2881673      4.45    0.000       1.44747     2.593133
     ip67c95 |    1.852557    .2669477      4.28    0.000      1.396741     2.457124
     ip67c96 |    1.980699    .2478299      5.46    0.000      1.549937     2.531179
     ip67c97 |    2.023748    .2665774      5.35    0.000      1.563264     2.619875
     ip67c98 |    1.844287    .2279171      4.95    0.000      1.447561     2.349741
     ip67c99 |    1.957994    .2410437      5.46    0.000      1.538232     2.492301
     ip68c80 |    2.156681    .2763884      6.00    0.000      1.677647     2.772498
     ip68c81 |    1.935908    .2946461      4.34    0.000      1.436585     2.608783
     ip68c82 |    1.777731    .2543469      4.02    0.000      1.343016     2.353156
     ip68c83 |    1.954777    .3189931      4.11    0.000      1.419687     2.691546
     ip68c84 |    1.719614    .2749062      3.39    0.001      1.257053     2.352385
     ip68c85 |    1.822424    .2644296      4.14    0.000       1.37133     2.421903
     ip68c86 |    1.611088    .2283599      3.36    0.001      1.220304     2.127017
     ip68c87 |    1.694629    .2524613      3.54    0.000      1.265508     2.269261
     ip68c88 |    1.552555    .2101404      3.25    0.001      1.190791     2.024222
     ip68c89 |    1.363035    .1670491      2.53    0.012       1.07198     1.733115
     ip68c90 |    1.400806    .1526585      3.09    0.002      1.131396     1.734367
     ip68c91 |     1.29249     .168058      1.97    0.048      1.001724     1.667654
     ip68c92 |    1.252738    .2095464      1.35    0.178      .9025659     1.738766
     ip68c93 |    1.463894    .1823937      3.06    0.002      1.146712     1.868809
     ip68c94 |    1.308647    .1691819      2.08    0.037      1.015732     1.686032
     ip68c95 |    1.218749     .184244      1.31    0.191      .9062214     1.639059
     ip68c96 |    1.416497    .1571191      3.14    0.002      1.139724     1.760482
     ip68c97 |    1.368436    .1592234      2.70    0.007      1.089391     1.718959
     ip68c98 |    1.255195    .1359769      2.10    0.036      1.015078     1.552112
     ip68c99 |    1.235816    .1524145      1.72    0.086      .9704525     1.573742
     ip69c80 |     2.87044    .4460345      6.79    0.000      2.116807     3.892385
     ip69c81 |    2.389561    .3274184      6.36    0.000      1.826779     3.125719
     ip69c82 |    2.539191    .3624699      6.53    0.000      1.919491     3.358957
     ip69c83 |    2.573225    .3249098      7.49    0.000      2.009094     3.295757
     ip69c84 |    2.368537    .3430201      5.95    0.000      1.783225     3.145968
     ip69c85 |     2.34449    .3201285      6.24    0.000      1.793994     3.063908
     ip69c86 |    2.100813    .2638383      5.91    0.000      1.642428      2.68713
     ip69c87 |    2.127751    .2697742      5.96    0.000      1.659581     2.727994
     ip69c88 |    1.761964    .2217921      4.50    0.000      1.376733     2.254989
     ip69c89 |    1.795186    .2217887      4.74    0.000      1.409115     2.287032
     ip69c90 |     1.78948    .1782347      5.84    0.000      1.472129     2.175242
     ip69c91 |     1.66451    .2014485      4.21    0.000      1.313014     2.110104
     ip69c92 |    1.679959    .2145826      4.06    0.000      1.307899     2.157861
     ip69c93 |      1.5705    .1771097      4.00    0.000      1.259058     1.958982
     ip69c94 |    1.449523    .1542879      3.49    0.000      1.176584     1.785778
     ip69c95 |    1.435708    .1650902      3.15    0.002      1.146008     1.798642
     ip69c96 |    1.396428    .1593326      2.93    0.003      1.116597     1.746388
     ip69c97 |    1.319834    .1573427      2.33    0.020      1.044827     1.667226
     ip69c98 |    1.278801    .1295789      2.43    0.015      1.048461     1.559746
     ip69c99 |    1.393476    .1390284      3.33    0.001      1.145973     1.694434
     ip70c80 |    2.715464    .3985655      6.81    0.000       2.03661     3.620597
     ip70c81 |      2.5129    .3787805      6.11    0.000      1.870122     3.376608
     ip70c82 |    2.321666    .3562751      5.49    0.000       1.71861     3.136334
     ip70c83 |    2.423006     .365773      5.86    0.000       1.80243     3.257245
     ip70c84 |    2.268421    .3479999      5.34    0.000      1.679346     3.064128
     ip70c85 |    2.402437    .3698605      5.69    0.000      1.776674     3.248601
     ip70c86 |    2.138529    .3154852      5.15    0.000      1.601556      2.85554
     ip70c87 |     2.23835    .3358781      5.37    0.000      1.668015     3.003696
     ip70c88 |    2.012773    .2672566      5.27    0.000      1.551573     2.611065
     ip70c89 |    1.905333    .2849477      4.31    0.000      1.421253     2.554291
     ip70c90 |    1.921366    .2630891      4.77    0.000      1.469118     2.512833
     ip70c91 |    1.787299    .2489835      4.17    0.000       1.36025     2.348419
     ip70c92 |    1.744319     .315119      3.08    0.002        1.2242     2.485417
     ip70c93 |    1.620691    .1921211      4.07    0.000      1.284684     2.044579
     ip70c94 |    1.580502    .2084199      3.47    0.001      1.220528     2.046645
     ip70c95 |    1.564756     .237267      2.95    0.003      1.162458     2.106279
     ip70c96 |    1.568342     .209332      3.37    0.001      1.207336     2.037293
     ip70c97 |     1.48787    .2020514      2.93    0.003      1.140178     1.941589
     ip70c98 |    1.382131     .187428      2.39    0.017      1.059545      1.80293
     ip70c99 |    1.416073    .1443497      3.41    0.001      1.159624     1.729236
     ip71c80 |    2.615402    .4158618      6.05    0.000      1.915108     3.571772
     ip71c81 |    2.353556    .3704152      5.44    0.000      1.728853      3.20399
     ip71c82 |    2.371863    .3826333      5.35    0.000       1.72891     3.253921
     ip71c83 |    2.456911    .3773154      5.85    0.000      1.818309     3.319793
     ip71c84 |    2.201454    .3053504      5.69    0.000      1.677431      2.88918
     ip71c85 |    2.168144    .3266628      5.14    0.000      1.613771     2.912957
     ip71c86 |    2.217875    .3148216      5.61    0.000      1.679234     2.929294
     ip71c87 |    2.014705     .299959      4.70    0.000      1.504806     2.697382
     ip71c88 |    1.957623    .2699129      4.87    0.000      1.494058     2.565021
     ip71c89 |    1.798258     .240135      4.39    0.000      1.384155     2.336251
     ip71c90 |    1.844396    .2484299      4.54    0.000      1.416453     2.401631
     ip71c91 |    1.828349    .2363333      4.67    0.000      1.419163     2.355515
     ip71c92 |    1.592669    .2110082      3.51    0.000      1.228436     2.064899
     ip71c93 |     1.61334    .1994904      3.87    0.000      1.266118     2.055784
     ip71c94 |    1.472819    .1778739      3.21    0.001      1.162382     1.866164
     ip71c95 |    1.503771    .1759392      3.49    0.000      1.195618     1.891347
     ip71c96 |      1.4652     .203936      2.74    0.006      1.115376     1.924742
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     ip71c99 |    1.313782    .1420137      2.52    0.012      1.062949     1.623806
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     ip72c82 |    2.414366      .35927      5.92    0.000      1.803599     3.231962
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ia2journal26 |     1.00046    .0001469      3.13    0.002      1.000172     1.000748
ia2journal27 |    1.000754    .0001441      5.24    0.000      1.000472     1.001037
ia2journal28 |    .9989833    .0001357     -7.49    0.000      .9987174     .9992494
ia2journal29 |     .997964    .0002837     -7.17    0.000      .9974081     .9985202
ia2journal30 |    .9968369    .0002599    -12.15    0.000      .9963277     .9973464
ia2journal31 |    1.001905    .0003008      6.34    0.000      1.001316     1.002495
ia2journal32 |    .9999703    .0003246     -0.09    0.927      .9993343     1.000607
ia2journal33 |    1.000311    .0003239      0.96    0.336      .9996767     1.000946
ia2journal34 |    .9979523    .0002227     -9.19    0.000       .997516     .9983888
ia2journal35 |     .999759    .0001933     -1.25    0.213      .9993802     1.000138
ia2journal36 |    1.008937    .0002955     30.38    0.000      1.008358     1.009516
ia2journal37 |    1.000334    .0002118      1.58    0.114      .9999194      1.00075
ia2journal38 |    1.000314    .0002028      1.55    0.122      .9999162     1.000711
ia2journal39 |    .9996312    .0001848     -2.00    0.046      .9992691     .9999934
ia2journal40 |    1.000624    .0002319      2.69    0.007      1.000169     1.001078
ia2journal41 |    1.000346    .0002062      1.68    0.093      .9999419      1.00075
ia2journal42 |    1.000145    .0002584      0.56    0.575      .9996384     1.000651
ia2journal43 |    .9994109    .0002115     -2.78    0.005      .9989964     .9998255
ia2journal44 |    .9989813    .0002005     -5.08    0.000      .9985885     .9993742
ia2journal45 |    .9976672    .0002862     -8.14    0.000      .9971064     .9982283
ia2journal46 |     .999531     .000201     -2.33    0.020      .9991373      .999925
ia2journal47 |    .9998264    .0002649     -0.66    0.512      .9993073     1.000346
ia2journal48 |      .99974    .0002672     -0.97    0.331      .9992165     1.000264
ia2journal49 |     1.00134    .0002454      5.46    0.000      1.000859     1.001821
ia2journal50 |    1.001296    .0002198      5.90    0.000      1.000866     1.001727
ia2journal51 |    .9936291    .0001925    -32.99    0.000      .9932519     .9940065
ia2journal52 |    .9977771    .0002852     -7.79    0.000      .9972183     .9983361
ia2journal53 |    1.000497     .000249      2.00    0.046      1.000009     1.000985
ia2journal54 |    .9981533     .000299     -6.17    0.000      .9975675     .9987395
ia2journal55 |    1.000296    .0001861      1.59    0.111      .9999315     1.000661
ia2journal56 |    1.002699    .0003795      7.12    0.000      1.001955     1.003443
ia2journal57 |    .9995139    .0002531     -1.92    0.055      .9990179      1.00001
ia2journal58 |    1.000285    .0002528      1.13    0.260      .9997895      1.00078
ia2journal59 |    .9991846    .0002645     -3.08    0.002      .9986663     .9997032
        op00 |    1.117284    .0407594      3.04    0.002      1.040186     1.200097
        os00 |    1.125679    .0787398      1.69    0.091      .9814638     1.291086
        oh00 |    1.158259    .0846417      2.01    0.044      1.003697     1.336622
        om00 |     1.26526    .0649959      4.58    0.000      1.144074     1.399283
        jp95 |    1.076115    .0297537      2.65    0.008      1.019351      1.13604
        jp00 |    1.040714    .0415107      1.00    0.317      .9624529     1.125338
        ep00 |    1.066018    .0526049      1.30    0.195      .9677434     1.174272
        jsfs |    1.015813    .0070982      2.25    0.025      1.001995      1.02982
        jsfp |      1.0061     .005664      1.08    0.280      .9950598     1.017263
        jsfd |    1.016056    .0067083      2.41    0.016      1.002993     1.029289
         esf |    1.011412    .0316178      0.36    0.717      .9513022     1.075319
-------------+----------------------------------------------------------------
Wald chi2(377) = -2.5e+16                                Prob > chi2 =   1.0000

. * Stats for elasticities;
. summ jsfs if jsfs > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfs |        700    6.557729    4.798608        .31      18.98

. summ jsfp if jsfp > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfp |        244    10.56262    4.860266        .46      18.98

. summ jsfd if jsfd > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfd |        535    11.56318    5.962941        .46      18.98

. summ esf  if esf  > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
         esf |         96    2.045521    .9338103        .93       5.07

. **********************************************************************;
. *** 1976-1985                                                      ***;
. **********************************************************************;
. clear;

. use temp_data_subs;

. gen plower = 1976;

. gen pupper = 1985;

. keep if pyear >= plower & pyear <= pupper;
(42,012 observations deleted)

. * Create fixed effects for publication x citation year interactions;
. * Drop the 2005 cyear to avoid multicolinearity with the constant;
. * Don't create variables with pyear after cyear;
. * Do create variables with pyear = cyear since keeping age0 = 1 observations;
. forvalues y = 56/99 {;
  2.    forvalues x = 80/99 {;
  3.       quietly gen ip`y'c`x' = py19`y' * c`x' if
>          (`x' >= `y')
>        & (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 56/99 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip`y'c0`x' = py19`y' * c0`x' if
>          (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 0/5 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip0`y'c0`x' = py200`y' * c0`x' if
>          (`x' >= `y')
>        & (2000 + `y' >= plower)
>        & (2000 + `y' <= pupper);
  4.    };
  5. };

. foreach var of varlist ip* {;
  2.    capture assert !missing(`var');
  3.    if _rc {;
  4.       drop `var';
  5.    };
  6. };

. egen title = group(journal);

. rename journal smournal;

. quietly tabulate title, generate(journal);

. drop title;

. foreach var of varlist journal* {;
  2.    quietly gen ia1`var' = age * `var';
  3.    quietly gen ia2`var' = age2 * `var';
  4.    quietly gen ia3`var' = age3 * `var';
  5.    quietly gen ia4`var' = age4 * `var';
  6. };

. rename smournal journal;

. * avoid multicolinearity by dropping first journal's age profile;
.  drop ia1journal1 ia2journal1 ia3journal1 ia4journal1;

.  * screen for small numbers within digitization categories;
. foreach var in op95 op00 os95 os00 oh95 oh00 om95 om00
>                jp95 jp00
>                ep95 ep00 ecf95 ecf00
>                jsfs_dum jsfp_dum jsfd_dum esf_dum {;
  2.    quietly egen countvar = total(`var' > 0);
  3.    drop if (countvar <= threshold) & (`var' > 0);
  4.    drop countvar;
  5.    };
(5 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)

. * apply second screen to pick up newly created small categories;
. foreach var in op95 op00 os95 os00 oh95 oh00 om95 om00
>                jp95 jp00
>                ep95 ep00 ecf95 ecf00
>                jsfs_dum jsfp_dum jsfd_dum esf_dum {;
  2.    quietly egen countvar = total(`var' > 0);
  3.    drop if (countvar <= threshold) & (`var' > 0);
  4.    drop countvar;
  5.    };
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)

. * Run regression;
. xtpqml cit ip* ia1j* ia2j*
>            op95 op00 os95 os00 oh95 oh00 om95 om00
>            jp95 jp00
>            ep95 ep00 ecf95 ecf00
>            jsfs jsfp jsfd esf,
>            i(volume) irr fe cluster(journal);
note: 2 groups (47 obs) dropped because of all zero outcomes
note: op95 dropped because of collinearity
note: os95 dropped because of collinearity
note: oh95 dropped because of collinearity
note: om95 dropped because of collinearity
note: ep95 dropped because of collinearity
note: ecf95 dropped because of collinearity
note: ecf00 dropped because of collinearity

Iteration 0:   log likelihood = -88341.548
Iteration 1:   log likelihood = -58245.762
Iteration 2:   log likelihood = -55839.027
Iteration 3:   log likelihood =  -55748.16
Iteration 4:   log likelihood = -55747.193
Iteration 5:   log likelihood = -55747.151
Iteration 6:   log likelihood = -55747.151

Conditional fixed-effects Poisson regression    Number of obs     =     18,389
Group variable: volume                          Number of groups  =        756

                                                Obs per group:
                                                              min =         16
                                                              avg =       24.3
                                                              max =         26

                                                Wald chi2(418)    =   49108.77
Log likelihood  = -55747.151                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip76c80 |     .998217     .050308     19.84    0.000       .899615     1.096819
     ip76c81 |    1.011202    .0505223     20.01    0.000      .9121801     1.110224
     ip76c82 |    .9701392    .0508961     19.06    0.000      .8703846     1.069894
     ip76c83 |    .9780481    .0510297     19.17    0.000      .8780318     1.078064
     ip76c84 |    .9172664    .0513513     17.86    0.000      .8166197     1.017913
     ip76c85 |    .8866106    .0514843     17.22    0.000      .7857032      .987518
     ip76c86 |    .8151595    .0516963     15.77    0.000      .7138365     .9164824
     ip76c87 |    .7460028    .0518213     14.40    0.000      .6444349     .8475707
     ip76c88 |    .6432074    .0520199     12.36    0.000      .5412502     .7451645
     ip76c89 |    .5971308     .051881     11.51    0.000      .4954459     .6988157
     ip76c90 |    .6305825    .0512705     12.30    0.000      .5300942     .7310708
     ip76c91 |    .5050028    .0513376      9.84    0.000      .4043829     .6056227
     ip76c92 |    .4252361    .0511233      8.32    0.000      .3250363     .5254359
     ip76c93 |    .3822874    .0506349      7.55    0.000      .2830448     .4815301
     ip76c94 |    .2866161    .0504018      5.69    0.000      .1878303     .3854019
     ip76c95 |    .3225016    .0492834      6.54    0.000      .2259079     .4190954
     ip76c96 |    .3367759    .0479641      7.02    0.000       .242768     .4307838
     ip76c97 |    .2106426     .047995      4.39    0.000      .1165742      .304711
     ip76c98 |    .2519126    .0463081      5.44    0.000      .1611504     .3426748
     ip76c99 |    .2204417    .0451826      4.88    0.000      .1318854      .308998
     ip77c80 |    .9127643     .046463     19.64    0.000      .8216985      1.00383
     ip77c81 |    .9391312    .0465473     20.18    0.000      .8479001     1.030362
     ip77c82 |    .8873817    .0469235     18.91    0.000      .7954133     .9793501
     ip77c83 |    .8997244    .0470183     19.14    0.000      .8075703     .9918785
     ip77c84 |    .8821744    .0471854     18.70    0.000      .7896927     .9746561
     ip77c85 |    .8491332    .0473564     17.93    0.000      .7563164     .9419499
     ip77c86 |    .7793907    .0476081     16.37    0.000      .6860806     .8727009
     ip77c87 |    .7177167    .0477639     15.03    0.000      .6241011     .8113322
     ip77c88 |    .6236437    .0479933     12.99    0.000      .5295786     .7177088
     ip77c89 |    .5831548    .0479158     12.17    0.000      .4892415     .6770681
     ip77c90 |    .5189316    .0478718     10.84    0.000      .4251046     .6127586
     ip77c91 |    .4445483     .047809      9.30    0.000      .3508444     .5382522
     ip77c92 |    .3495942    .0477981      7.31    0.000      .2559117     .4432768
     ip77c93 |    .3159552    .0473883      6.67    0.000      .2230758     .4088346
     ip77c94 |    .2594154    .0470443      5.51    0.000      .1672102     .3516206
     ip77c95 |    .2409606    .0464097      5.19    0.000      .1499992      .331922
     ip77c96 |    .2547807    .0452094      5.64    0.000       .166172     .3433894
     ip77c97 |    .2008615    .0449244      4.47    0.000      .1128113     .2889118
     ip77c98 |    .1294495    .0441028      2.94    0.003      .0430097     .2158894
     ip77c99 |    .1308499    .0428275      3.06    0.002      .0469095     .2147902
     ip78c80 |    .9214214    .0468358     19.67    0.000      .8296249     1.013218
     ip78c81 |    1.084368    .0462156     23.46    0.000      .9937874     1.174949
     ip78c82 |    1.032282    .0465191     22.19    0.000      .9411064     1.123458
     ip78c83 |    1.081284    .0464301     23.29    0.000      .9902831     1.172286
     ip78c84 |    1.046712    .0466412     22.44    0.000       .955297     1.138127
     ip78c85 |    1.024363    .0467734     21.90    0.000      .9326886     1.116037
     ip78c86 |    .9363295    .0471098     19.88    0.000      .8439959     1.028663
     ip78c87 |    .8589189    .0473617     18.14    0.000      .7660916     .9517463
     ip78c88 |    .8059492    .0474576     16.98    0.000       .712934     .8989645
     ip78c89 |    .7167495    .0476506     15.04    0.000      .6233561     .8101428
     ip78c90 |     .683322    .0475294     14.38    0.000       .590166      .776478
     ip78c91 |    .5939352    .0476047     12.48    0.000      .5006316     .6872387
     ip78c92 |    .5155951    .0475747     10.84    0.000      .4223504     .6088399
     ip78c93 |    .4558403     .047392      9.62    0.000      .3629538     .5487269
     ip78c94 |    .4037254    .0471104      8.57    0.000      .3113906     .4960602
     ip78c95 |    .3829577      .04659      8.22    0.000       .291643     .4742724
     ip78c96 |    .3867964     .045541      8.49    0.000      .2975376     .4760551
     ip78c97 |    .2763595    .0457362      6.04    0.000      .1867183     .3660008
     ip78c98 |    .3098004    .0442676      7.00    0.000      .2230375     .3965632
     ip78c99 |    .2179581    .0437335      4.98    0.000       .132242     .3036741
     ip79c80 |    .0880151     .045549      1.93    0.053     -.0012592     .1772895
     ip79c81 |    .5674826    .0425267     13.34    0.000      .4841319     .6508333
     ip79c82 |    .7448789    .0417254     17.85    0.000      .6630986     .8266593
     ip79c83 |    .7926171    .0415647     19.07    0.000      .7111518     .8740825
     ip79c84 |    .7595475    .0417245     18.20    0.000       .677769      .841326
     ip79c85 |    .7460011    .0417988     17.85    0.000      .6640769     .8279253
     ip79c86 |    .6842929    .0420285     16.28    0.000      .6019186     .7666672
     ip79c87 |    .6321821    .0421848     14.99    0.000      .5495014     .7148628
     ip79c88 |    .5725411    .0423242     13.53    0.000      .4895871     .6554951
     ip79c89 |    .5118328    .0424147     12.07    0.000      .4287016      .594964
     ip79c90 |    .5020113    .0422279     11.89    0.000      .4192461     .5847765
     ip79c91 |    .4153876    .0423031      9.82    0.000      .3324751     .4983001
     ip79c92 |    .3664179      .04215      8.69    0.000      .2838055     .4490303
     ip79c93 |    .3247614    .0418945      7.75    0.000      .2426496     .4068732
     ip79c94 |    .2909323    .0415333      7.00    0.000      .2095286      .372336
     ip79c95 |    .2852813     .040966      6.96    0.000      .2049894     .3655732
     ip79c96 |    .2741699    .0399905      6.86    0.000        .19579     .3525499
     ip79c97 |    .1973507    .0399518      4.94    0.000      .1190465     .2756548
     ip79c98 |    .1586153    .0388795      4.08    0.000      .0824129     .2348177
     ip79c99 |    .1775257     .037593      4.72    0.000      .1038447     .2512066
     ip80c80 |   -1.297964    .0648333    -20.02    0.000     -1.425035    -1.170893
     ip80c81 |    .1787853    .0446851      4.00    0.000       .091204     .2663665
     ip80c82 |     .716967    .0414709     17.29    0.000      .6356856     .7982485
     ip80c83 |    .9390017    .0405111     23.18    0.000      .8596013     1.018402
     ip80c84 |    .8703241     .040711     21.38    0.000      .7905319     .9501162
     ip80c85 |    .9035546    .0405665     22.27    0.000      .8240457     .9830635
     ip80c86 |    .8370026    .0407741     20.53    0.000      .7570868     .9169184
     ip80c87 |    .7633766    .0409981     18.62    0.000      .6830217     .8437315
     ip80c88 |    .7173392     .041095     17.46    0.000      .6367946     .7978839
     ip80c89 |    .6686116    .0411645     16.24    0.000      .5879306     .7492925
     ip80c90 |    .6187428    .0411929     15.02    0.000      .5380062     .6994794
     ip80c91 |    .6043887    .0410243     14.73    0.000      .5239825     .6847949
     ip80c92 |    .5047238    .0411527     12.26    0.000       .424066     .5853815
     ip80c93 |    .4632244    .0409814     11.30    0.000      .3829024     .5435464
     ip80c94 |    .3930809    .0408851      9.61    0.000      .3129475     .4732142
     ip80c95 |    .3700594    .0405134      9.13    0.000      .2906547     .4494642
     ip80c96 |    .3547443     .039681      8.94    0.000      .2769709     .4325177
     ip80c97 |    .2956415    .0396688      7.45    0.000       .217892      .373391
     ip80c98 |    .2757651    .0386198      7.14    0.000      .2000718     .3514585
     ip80c99 |     .257172    .0376436      6.83    0.000      .1833918     .3309522
     ip81c81 |   -1.369156    .0643687    -21.27    0.000     -1.495316    -1.242995
     ip81c82 |    .1537291     .043471      3.54    0.000      .0685275     .2389308
     ip81c83 |    .7550253     .039952     18.90    0.000      .6767208     .8333298
     ip81c84 |    .8452109    .0394361     21.43    0.000      .7679175     .9225042
     ip81c85 |    .9421531    .0389843     24.17    0.000      .8657453     1.018561
     ip81c86 |    .8734301     .039134     22.32    0.000      .7967288     .9501313
     ip81c87 |    .8332254    .0391965     21.26    0.000      .7564016     .9100492
     ip81c88 |    .7575127    .0393816     19.24    0.000      .6803262     .8346993
     ip81c89 |    .6958425    .0395011     17.62    0.000      .6184218     .7732631
     ip81c90 |    .7001666    .0393374     17.80    0.000      .6230668     .7772664
     ip81c91 |    .6124667    .0394891     15.51    0.000      .5350695     .6898638
     ip81c92 |    .5380459    .0395548     13.60    0.000        .46052     .6155718
     ip81c93 |    .4861052    .0394821     12.31    0.000      .4087217     .5634886
     ip81c94 |    .4017219    .0395126     10.17    0.000      .3242786     .4791652
     ip81c95 |    .3932206     .039141     10.05    0.000      .3165057     .4699355
     ip81c96 |    .3864053    .0383637     10.07    0.000      .3112138     .4615969
     ip81c97 |    .3111987    .0384905      8.09    0.000      .2357586     .3866388
     ip81c98 |    .2927415    .0375719      7.79    0.000      .2191019     .3663812
     ip81c99 |    .2455574    .0368682      6.66    0.000       .173297     .3178178
     ip82c82 |   -1.427003    .0610849    -23.36    0.000     -1.546727    -1.307279
     ip82c83 |     .151887    .0408547      3.72    0.000      .0718133     .2319607
     ip82c84 |    .6440334    .0379712     16.96    0.000      .5696113     .7184555
     ip82c85 |    .8171602    .0370548     22.05    0.000      .7445341     .8897863
     ip82c86 |    .7843824    .0369564     21.22    0.000      .7119492     .8568156
     ip82c87 |     .767451    .0368448     20.83    0.000      .6952365     .8396654
     ip82c88 |    .7571344    .0367315     20.61    0.000      .6851419     .8291269
     ip82c89 |    .6657016    .0368986     18.04    0.000      .5933816     .7380216
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ia2journal36 |    .0002493    .0012237      0.20    0.839     -.0021491     .0026476
ia2journal37 |   -.0013451    .0005055     -2.66    0.008     -.0023358    -.0003544
ia2journal38 |   -.0010383    .0004915     -2.11    0.035     -.0020017    -.0000749
ia2journal39 |   -.0008019    .0007565     -1.06    0.289     -.0022847     .0006808
ia2journal40 |    .0000111    .0003072      0.04    0.971     -.0005911     .0006132
ia2journal41 |    .0011469    .0009974      1.15    0.250      -.000808     .0031019
ia2journal42 |   -.0001237     .000393     -0.31    0.753      -.000894     .0006466
ia2journal43 |    .0018062    .0005147      3.51    0.000      .0007974      .002815
ia2journal44 |    .0096969    .0022499      4.31    0.000      .0052872     .0141066
ia2journal45 |   -.0004831    .0002554     -1.89    0.059     -.0009837     .0000176
ia2journal46 |   -.0009224    .0005543     -1.66    0.096     -.0020088     .0001639
ia2journal47 |   -.0002237    .0007522     -0.30    0.766      -.001698     .0012506
ia2journal48 |   -.0004174    .0015031     -0.28    0.781     -.0033635     .0025288
ia2journal49 |   -.0012853    .0004215     -3.05    0.002     -.0021114    -.0004592
ia2journal50 |    .0022278      .00079      2.82    0.005      .0006794     .0037763
ia2journal51 |   -.0004251    .0008309     -0.51    0.609     -.0020536     .0012034
ia2journal52 |   -.0002367    .0011969     -0.20    0.843     -.0025826     .0021093
ia2journal53 |   -.0015752    .0014215     -1.11    0.268     -.0043614      .001211
ia2journal54 |   -.0013797    .0003659     -3.77    0.000     -.0020968    -.0006626
ia2journal55 |   -.0000588    .0002873     -0.20    0.838     -.0006218     .0005043
ia2journal56 |   -.0018046    .0004769     -3.78    0.000     -.0027394    -.0008699
ia2journal57 |   -.0010843    .0006428     -1.69    0.092     -.0023442     .0001755
ia2journal58 |   -.0000723    .0001883     -0.38    0.701     -.0004413     .0002968
ia2journal59 |    .0003137    .0003551      0.88    0.377     -.0003824     .0010097
ia2journal60 |    .0014594    .0001601      9.12    0.000      .0011456     .0017732
ia2journal61 |    .0001174    .0009785      0.12    0.904     -.0018005     .0020353
ia2journal62 |   -.0003177    .0002824     -1.13    0.261     -.0008711     .0002357
ia2journal63 |   -.0011469    .0010764     -1.07    0.287     -.0032566     .0009628
ia2journal64 |   -.0020071    .0002289     -8.77    0.000     -.0024558    -.0015585
ia2journal65 |   -.0029963    .0010549     -2.84    0.005     -.0050638    -.0009289
ia2journal66 |   -.0006245    .0005251     -1.19    0.234     -.0016538     .0004047
ia2journal67 |   -.0018002    .0002416     -7.45    0.000     -.0022737    -.0013266
ia2journal68 |    .0006019    .0001792      3.36    0.001      .0002506     .0009531
ia2journal69 |   -.0018961    .0002308     -8.21    0.000     -.0023484    -.0014437
ia2journal70 |   -.0037823    .0017167     -2.20    0.028     -.0071471    -.0004176
ia2journal71 |   -.0003001    .0002311     -1.30    0.194     -.0007531     .0001529
ia2journal72 |   -.0003093    .0004313     -0.72    0.473     -.0011545      .000536
ia2journal73 |   -.0006421    .0002891     -2.22    0.026     -.0012086    -.0000755
ia2journal74 |    .0016912    .0003394      4.98    0.000       .001026     .0023564
ia2journal75 |   -.0054482    .0069121     -0.79    0.431     -.0189957     .0080994
ia2journal76 |   -.0035147    .0005133     -6.85    0.000     -.0045207    -.0025087
ia2journal77 |   -.0000618     .000561     -0.11    0.912     -.0011613     .0010378
ia2journal78 |    .0007593    .0004809      1.58    0.114     -.0001833     .0017018
ia2journal79 |   -.0007873    .0003588     -2.19    0.028     -.0014905    -.0000842
ia2journal80 |     .000822    .0005549      1.48    0.139     -.0002656     .0019096
ia2journal81 |    .0022717    .0007197      3.16    0.002      .0008611     .0036824
ia2journal82 |   -.0006192    .0002325     -2.66    0.008     -.0010748    -.0001636
ia2journal83 |     .003161    .0007799      4.05    0.000      .0016325     .0046895
ia2journal84 |     .000048    .0009477      0.05    0.960     -.0018096     .0019055
ia2journal85 |   -.0021674    .0008322     -2.60    0.009     -.0037984    -.0005363
ia2journal86 |    .0000414    .0006457      0.06    0.949     -.0012241      .001307
ia2journal87 |    .0007619     .000425      1.79    0.073     -.0000711     .0015949
        op00 |     .093533    .0141141      6.63    0.000        .06587     .1211961
        os00 |    .0737508    .0172431      4.28    0.000      .0399548     .1075467
        oh00 |    .1308043    .0209452      6.25    0.000      .0897525     .1718561
        om00 |    .1417253    .0240361      5.90    0.000      .0946155     .1888352
        jp95 |     .014715    .0119148      1.24    0.217     -.0086375     .0380675
        jp00 |     .016728    .0130005      1.29    0.198     -.0087525     .0422085
        ep00 |   -.0235418    .0206838     -1.14    0.255     -.0640813     .0169978
        jsfs |     .008814      .00144      6.12    0.000      .0059918     .0116363
        jsfp |    .0011128    .0016351      0.68    0.496      -.002092     .0043176
        jsfd |    .0066622    .0013598      4.90    0.000       .003997     .0093274
         esf |   -.0231336    .0090888     -2.55    0.011     -.0409473    -.0053199
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip76c80 |    2.713439    .3507294      7.72    0.000      2.106187     3.495774
     ip76c81 |    2.748903    .3332638      8.34    0.000      2.167524     3.486222
     ip76c82 |    2.638312    .3088208      8.29    0.000      2.097446     3.318649
     ip76c83 |    2.659261    .3071777      8.47    0.000      2.120491     3.334919
     ip76c84 |     2.50244    .2601657      8.82    0.000      2.041121     3.068024
     ip76c85 |     2.42689    .2641189      8.15    0.000      1.960711     3.003907
     ip76c86 |    2.259536     .251357      7.33    0.000      1.816893     2.810019
     ip76c87 |    2.108555    .2142835      7.34    0.000       1.72775     2.573291
     ip76c88 |    1.902573     .193408      6.33    0.000      1.558876     2.322048
     ip76c89 |    1.816898    .1946993      5.57    0.000      1.472704     2.241535
     ip76c90 |    1.878705    .1928419      6.14    0.000      1.536335     2.297371
     ip76c91 |     1.65699    .1605907      5.21    0.000      1.370326     2.003623
     ip76c92 |    1.529952    .1536199      4.24    0.000      1.256637     1.862711
     ip76c93 |    1.465633    .1364303      4.11    0.000      1.221209     1.758978
     ip76c94 |    1.331913    .1312721      2.91    0.004      1.097949     1.615733
     ip76c95 |    1.380577    .1361385      3.27    0.001      1.137952     1.674933
     ip76c96 |    1.400425    .1193751      3.95    0.000      1.184955     1.655077
     ip76c97 |    1.234471    .1072708      2.42    0.015      1.041154     1.463683
     ip76c98 |    1.286484    .0933982      3.47    0.001      1.115854     1.483205
     ip76c99 |    1.246627    .0987864      2.78    0.005      1.067296      1.45609
     ip77c80 |    2.491199    .3433133      6.62    0.000      1.901534      3.26372
     ip77c81 |    2.557758    .3178501      7.56    0.000      2.004848     3.263153
     ip77c82 |    2.428762    .3006665      7.17    0.000       1.90551     3.095699
     ip77c83 |    2.458925     .309058      7.16    0.000      1.922026     3.145802
     ip77c84 |    2.416148    .2955674      7.21    0.000      1.901061     3.070796
     ip77c85 |     2.33762    .2810044      7.06    0.000      1.846933      2.95867
     ip77c86 |    2.180144     .286903      5.92    0.000       1.68449     2.821641
     ip77c87 |    2.049748    .2473762      5.95    0.000      1.617976     2.596741
     ip77c88 |    1.865714    .2159978      5.39    0.000      1.486961     2.340941
     ip77c89 |    1.791682    .2071423      5.04    0.000      1.428403     2.247352
     ip77c90 |    1.680231    .1999179      4.36    0.000      1.330734      2.12152
     ip77c91 |    1.559786    .1723048      4.02    0.000      1.256132     1.936844
     ip77c92 |    1.418492    .1750545      2.83    0.005      1.113733     1.806645
     ip77c93 |    1.371569    .1589977      2.73    0.006      1.092806     1.721442
     ip77c94 |    1.296172    .1336307      2.52    0.012      1.059026     1.586421
     ip77c95 |    1.272471    .1362516      2.25    0.024      1.031583     1.569609
     ip77c96 |    1.290179    .1262901      2.60    0.009       1.06495     1.563041
     ip77c97 |    1.222455    .1240357      1.98    0.048      1.001997     1.491419
     ip77c98 |    1.138202    .1056393      1.39    0.163      .9488928     1.365279
     ip77c99 |    1.139797    .0963674      1.55    0.122      .9657396     1.345224
     ip78c80 |     2.51286    .2991217      7.74    0.000       1.98996     3.173161
     ip78c81 |    2.957571    .3922993      8.18    0.000      2.280498     3.835664
     ip78c82 |    2.807465    .3437508      8.43    0.000      2.208472     3.568921
     ip78c83 |    2.948464    .3951739      8.07    0.000      2.267315     3.834245
     ip78c84 |    2.848271    .3507004      8.50    0.000      2.237561     3.625664
     ip78c85 |     2.78532    .3650974      7.81    0.000      2.154271     3.601222
     ip78c86 |    2.550602    .3289622      7.26    0.000      1.980886     3.284172
     ip78c87 |    2.360607    .2984222      6.79    0.000       1.84254      3.02434
     ip78c88 |    2.238821    .2756678      6.55    0.000      1.758775     2.849892
     ip78c89 |    2.047766    .2595099      5.66    0.000      1.597383     2.625135
     ip78c90 |    1.980446    .2517338      5.38    0.000      1.543715     2.540732
     ip78c91 |    1.811101    .2053572      5.24    0.000      1.450196     2.261824
     ip78c92 |    1.674635    .1874128      4.61    0.000      1.344807     2.085357
     ip78c93 |    1.577498    .1815957      3.96    0.000      1.258873      1.97677
     ip78c94 |    1.497393    .1656225      3.65    0.000      1.205554     1.859879
     ip78c95 |    1.466616    .1644997      3.41    0.001      1.177181     1.827214
     ip78c96 |    1.472257    .1510663      3.77    0.000      1.204045     1.800214
     ip78c97 |    1.318322    .1374305      2.65    0.008      1.074698     1.617172
     ip78c98 |    1.363153    .1365534      3.09    0.002      1.120149     1.658874
     ip78c99 |    1.243535      .10725      2.53    0.011      1.050135     1.472552
     ip79c80 |    1.092005    .1349294      0.71    0.476      .8571345     1.391233
     ip79c81 |    1.763821    .2421763      4.13    0.000      1.347668     2.308481
     ip79c82 |    2.106186    .2888307      5.43    0.000      1.609785     2.755662
     ip79c83 |    2.209171    .2964535      5.91    0.000      1.698262     2.873782
     ip79c84 |    2.137309    .2998681      5.41    0.000      1.623462     2.813794
     ip79c85 |    2.108551    .2874486      5.47    0.000       1.61415     2.754383
     ip79c86 |     1.98237    .2698479      5.03    0.000      1.518154     2.588532
     ip79c87 |    1.881712    .2429731      4.90    0.000      1.460976     2.423613
     ip79c88 |    1.772766    .2379066      4.27    0.000       1.36276     2.306128
     ip79c89 |    1.668346    .2197867      3.89    0.000      1.288693     2.159846
     ip79c90 |    1.652041    .2143991      3.87    0.000      1.281012     2.130533
     ip79c91 |    1.514958    .1916104      3.28    0.001      1.182337     1.941153
     ip79c92 |    1.442558    .1717757      3.08    0.002      1.142285     1.821763
     ip79c93 |      1.3837    .1668939      2.69    0.007      1.092383     1.752706
     ip79c94 |    1.337674    .1522187      2.56    0.011      1.070259     1.671905
     ip79c95 |    1.330136    .1496192      2.54    0.011      1.066963     1.658222
     ip79c96 |    1.315438    .1369952      2.63    0.008      1.072563     1.613311
     ip79c97 |    1.218171     .122421      1.96    0.050      1.000383     1.483373
     ip79c98 |    1.171887    .1057331      1.76    0.079      .9819432     1.398573
     ip79c99 |    1.194259    .1010399      2.10    0.036      1.011772     1.409659
     ip80c80 |    .2730871    .0357194     -9.92    0.000       .211332     .3528882
     ip80c81 |    1.195764    .1177517      1.82    0.069      .9858803      1.45033
     ip80c82 |    2.048212    .1876031      7.83    0.000      1.711631     2.450978
     ip80c83 |    2.557427    .2710262      8.86    0.000      2.077764     3.147823
     ip80c84 |    2.387684     .246183      8.44    0.000      1.950803     2.922405
     ip80c85 |    2.468362    .2821684      7.90    0.000      1.972897     3.088254
     ip80c86 |    2.309434    .2572261      7.51    0.000      1.856514      2.87285
     ip80c87 |    2.145509    .2504098      6.54    0.000      1.706804     2.696975
     ip80c88 |    2.048974    .2295048      6.40    0.000      1.645105     2.551992
     ip80c89 |    1.951526    .2120587      6.15    0.000      1.577176     2.414729
     ip80c90 |    1.856593    .2037869      5.64    0.000      1.497219     2.302225
     ip80c91 |    1.830133    .1766717      6.26    0.000      1.514649     2.211329
     ip80c92 |    1.656528     .166076      5.03    0.000      1.361009     2.016213
     ip80c93 |     1.58919     .149477      4.92    0.000      1.321639     1.910903
     ip80c94 |    1.481538    .1282353      4.54    0.000      1.250365     1.755452
     ip80c95 |    1.447821    .1343393      3.99    0.000      1.207075     1.736583
     ip80c96 |    1.425816     .118152      4.28    0.000       1.21207     1.677256
     ip80c97 |    1.343988    .1124584      3.53    0.000      1.140699     1.583507
     ip80c98 |    1.317538    .0940274      3.86    0.000      1.145556      1.51534
     ip80c99 |    1.293268    .0851899      3.90    0.000      1.136628     1.471494
     ip81c81 |    .2543216     .038393     -9.07    0.000      .1891839      .341887
     ip81c82 |    1.166175    .1302039      1.38    0.169      .9369723     1.451445
     ip81c83 |    2.127665    .2487115      6.46    0.000       1.69201     2.675492
     ip81c84 |    2.328469    .2572835      7.65    0.000      1.875069     2.891503
     ip81c85 |    2.565499     .307006      7.87    0.000      2.029135     3.243641
     ip81c86 |    2.395112    .3065816      6.82    0.000      1.863672     3.078097
     ip81c87 |    2.300728    .2712138      7.07    0.000      1.826098      2.89872
     ip81c88 |    2.132964    .2583218      6.25    0.000      1.682268     2.704407
     ip81c89 |    2.005398    .2329037      5.99    0.000      1.597141     2.518012
     ip81c90 |    2.014088    .2399659      5.88    0.000      1.594642     2.543863
     ip81c91 |    1.844977    .2264323      4.99    0.000       1.45052     2.346703
     ip81c92 |    1.712657    .2035452      4.53    0.000      1.356773      2.16189
     ip81c93 |    1.625971    .1860271      4.25    0.000      1.299352     2.034692
     ip81c94 |    1.494396    .1609187      3.73    0.000       1.21006     1.845543
     ip81c95 |    1.481745    .1570363      3.71    0.000      1.203823      1.82383
     ip81c96 |    1.471681     .159339      3.57    0.000      1.190293     1.819589
     ip81c97 |     1.36506    .1289332      3.29    0.001      1.134368     1.642668
     ip81c98 |    1.340096    .1282135      3.06    0.002      1.110958     1.616496
     ip81c99 |    1.278334    .1108656      2.83    0.005      1.078506     1.515186
     ip82c82 |    .2400271    .0335382    -10.21    0.000      .1825261     .3156428
     ip82c83 |    1.164029    .1286618      1.37    0.169      .9373011       1.4456
     ip82c84 |    1.904146    .2308964      5.31    0.000      1.501356     2.414998
     ip82c85 |    2.264061    .2748253      6.73    0.000      1.784696     2.872183
     ip82c86 |    2.191053     .254518      6.75    0.000      1.744919     2.751253
     ip82c87 |    2.154268     .248512      6.65    0.000      1.718331     2.700801
     ip82c88 |    2.132158    .2210623      7.30    0.000       1.74007     2.612594
     ip82c89 |    1.945855    .2119617      6.11    0.000      1.571771     2.408972
     ip82c90 |    1.954631    .2151614      6.09    0.000      1.575311     2.425287
     ip82c91 |    1.816077    .1805378      6.00    0.000      1.494568      2.20675
     ip82c92 |    1.727352    .1627536      5.80    0.000      1.436082     2.077697
     ip82c93 |    1.701077    .1623361      5.57    0.000      1.410888     2.050951
     ip82c94 |    1.570935    .1370855      5.18    0.000      1.323973     1.863962
     ip82c95 |    1.535083    .1407215      4.68    0.000      1.282631     1.837222
     ip82c96 |    1.549862    .1400985      4.85    0.000      1.298224     1.850277
     ip82c97 |    1.401383    .1188565      3.98    0.000      1.186761     1.654819
     ip82c98 |    1.367276    .1046046      4.09    0.000      1.176886     1.588467
     ip82c99 |    1.276437    .0891858      3.49    0.000      1.113077     1.463773
     ip83c83 |    .3579845    .0716889     -5.13    0.000      .2417715      .530058
     ip83c84 |     1.30332    .1524105      2.27    0.023      1.036362     1.639045
     ip83c85 |    2.177518    .2378213      7.13    0.000      1.757909     2.697287
     ip83c86 |    2.398608    .2656616      7.90    0.000      1.930559     2.980131
     ip83c87 |    2.353868    .2758483      7.30    0.000      1.870813     2.961651
     ip83c88 |    2.374541    .2749444      7.47    0.000      1.892432     2.979469
     ip83c89 |    2.187561     .268564      6.38    0.000      1.719726     2.782666
     ip83c90 |    2.101762    .2605307      5.99    0.000      1.648428     2.679766
     ip83c91 |    1.965983    .2238823      5.94    0.000      1.572703      2.45761
     ip83c92 |    1.884288    .2227608      5.36    0.000      1.494576     2.375617
     ip83c93 |    1.797776    .2002639      5.27    0.000      1.445159     2.236431
     ip83c94 |    1.592705    .1711021      4.33    0.000      1.290304     1.965979
     ip83c95 |    1.619898    .1590727      4.91    0.000      1.336289       1.9637
     ip83c96 |    1.570346    .1439741      4.92    0.000      1.312063     1.879473
     ip83c97 |    1.447975    .1459122      3.67    0.000      1.188463     1.764154
     ip83c98 |    1.363164    .1047225      4.03    0.000      1.172617     1.584674
     ip83c99 |    1.332396    .1011658      3.78    0.000      1.148163     1.546191
     ip84c84 |    .3078709    .0415352     -8.73    0.000      .2363372     .4010563
     ip84c85 |    1.159606    .1167201      1.47    0.141      .9519913     1.412499
     ip84c86 |    1.934657    .1861126      6.86    0.000      1.602209     2.336087
     ip84c87 |    2.143362    .1989488      8.21    0.000      1.786843     2.571017
     ip84c88 |     2.06535    .1965031      7.62    0.000      1.713989     2.488739
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ia2journal61 |    1.000117    .0006119      0.19    0.848      .9989189     1.001317
ia2journal62 |    .9996824    .0003044     -1.04    0.297       .999086     1.000279
ia2journal63 |    .9988537    .0006454     -1.78    0.076      .9975895      1.00012
ia2journal64 |    .9979949    .0002011     -9.96    0.000      .9976007     .9983892
ia2journal65 |    .9970082    .0003368     -8.87    0.000      .9963483     .9976685
ia2journal66 |    .9993757    .0001563     -3.99    0.000      .9990694      .999682
ia2journal67 |    .9982015    .0002398     -7.49    0.000      .9977315     .9986716
ia2journal68 |    1.000602    .0001569      3.84    0.000      1.000295      1.00091
ia2journal69 |    .9981057     .000271     -6.98    0.000      .9975748     .9986369
ia2journal70 |    .9962248    .0003718    -10.13    0.000      .9954963     .9969539
ia2journal71 |    .9996999    .0002727     -1.10    0.271      .9991656     1.000235
ia2journal72 |    .9996908    .0001646     -1.88    0.060      .9993682     1.000013
ia2journal73 |    .9993581    .0002977     -2.16    0.031      .9987748     .9999417
ia2journal74 |    1.001693    .0001436     11.80    0.000      1.001411     1.001974
ia2journal75 |    .9945667    .0004308    -12.58    0.000      .9937226     .9954114
ia2journal76 |    .9964914     .000299    -11.71    0.000      .9959056     .9970776
ia2journal77 |    .9999382    .0002435     -0.25    0.800      .9994611     1.000416
ia2journal78 |     1.00076    .0002788      2.73    0.006      1.000213     1.001306
ia2journal79 |     .999213    .0003206     -2.45    0.014      .9985848     .9998416
ia2journal80 |    1.000822    .0001509      5.45    0.000      1.000527     1.001118
ia2journal81 |    1.002274    .0002218     10.26    0.000       1.00184     1.002709
ia2journal82 |     .999381    .0001716     -3.61    0.000      .9990449     .9997173
ia2journal83 |    1.003166    .0001588     19.97    0.000      1.002855     1.003477
ia2journal84 |    1.000048    .0004623      0.10    0.917      .9991424     1.000954
ia2journal85 |     .997835    .0002744     -7.88    0.000      .9972974     .9983729
ia2journal86 |    1.000041    .0005394      0.08    0.939      .9989848     1.001099
ia2journal87 |    1.000762    .0001561      4.89    0.000      1.000456     1.001068
        op00 |    1.098047    .0347178      2.96    0.003      1.032067     1.168245
        os00 |    1.076538    .0406662      1.95    0.051      .9997132     1.159267
        oh00 |    1.139745    .0408681      3.65    0.000      1.062395     1.222726
        om00 |     1.15226    .0692683      2.36    0.018       1.02419     1.296345
        jp95 |    1.014824    .0246246      0.61    0.544      .9676901     1.064253
        jp00 |    1.016869    .0221291      0.77    0.442      .9744084     1.061179
        ep00 |    .9767332    .0443255     -0.52    0.604      .8936085      1.06759
        jsfs |    1.008853    .0051425      1.73    0.084       .998824     1.018983
        jsfp |    1.001113    .0040634      0.27    0.784      .9931809     1.009109
        jsfd |    1.006684    .0035825      1.87    0.061      .9996872     1.013731
         esf |    .9771319    .0252805     -0.89    0.371      .9288184     1.027959
-------------+----------------------------------------------------------------
Wald chi2(418) = -1.1e+17                                Prob > chi2 =   1.0000

. * Stats for elasticities;
. summ jsfs if jsfs > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfs |        856    7.059136     4.95734        .31      18.98

. summ jsfp if jsfp > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfp |        266     10.9241    5.294205        .46      18.98

. summ jsfd if jsfd > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfd |        694    10.15281    6.119721        .46      18.98

. summ esf  if esf  > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
         esf |        555    2.152757    .8589542        .93       5.07

. **********************************************************************;
. *** 1986-1995                                                      ***;
. **********************************************************************;
. clear;

. use temp_data_subs;

. gen plower = 1986;

. gen pupper = 1995;

. keep if pyear >= plower & pyear <= pupper;
(45,391 observations deleted)

. * Create fixed effects for publication x citation year interactions;
. * Drop the 2005 cyear to avoid multicolinearity with the constant;
. * Don't create variables with pyear after cyear;
. * Do create variables with pyear = cyear since keeping age0 = 1 observations;
. forvalues y = 56/99 {;
  2.    forvalues x = 80/99 {;
  3.       quietly gen ip`y'c`x' = py19`y' * c`x' if
>          (`x' >= `y')
>        & (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 56/99 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip`y'c0`x' = py19`y' * c0`x' if
>          (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 0/5 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip0`y'c0`x' = py200`y' * c0`x' if
>          (`x' >= `y')
>        & (2000 + `y' >= plower)
>        & (2000 + `y' <= pupper);
  4.    };
  5. };

. foreach var of varlist ip* {;
  2.    capture assert !missing(`var');
  3.    if _rc {;
  4.       drop `var';
  5.    };
  6. };

. egen title = group(journal);

. rename journal smournal;

. quietly tabulate title, generate(journal);

. drop title;

. foreach var of varlist journal* {;
  2.    quietly gen ia1`var' = age * `var';
  3.    quietly gen ia2`var' = age2 * `var';
  4.    quietly gen ia3`var' = age3 * `var';
  5.    quietly gen ia4`var' = age4 * `var';
  6. };

. rename smournal journal;

. * avoid multicolinearity by dropping first journal's age profile;
.  drop ia1journal1 ia2journal1 ia3journal1 ia4journal1;

.  * screen for small numbers within digitization categories;
. foreach var in op95 op00 os95 os00 oh95 oh00 om95 om00
>                jp95 jp00
>                ep95 ep00 ecf95 ecf00
>                jsfs_dum jsfp_dum jsfd_dum esf_dum {;
  2.    quietly egen countvar = total(`var' > 0);
  3.    drop if (countvar <= threshold) & (`var' > 0);
  4.    drop countvar;
  5.    };
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)

. * apply second screen to pick up newly created small categories;
. foreach var in op95 op00 os95 os00 oh95 oh00 om95 om00
>                jp95 jp00
>                ep95 ep00 ecf95 ecf00
>                jsfs_dum jsfp_dum jsfd_dum esf_dum {;
  2.    quietly egen countvar = total(`var' > 0);
  3.    drop if (countvar <= threshold) & (`var' > 0);
  4.    drop countvar;
  5.    };
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)

. * Run regression;
. xtpqml cit ip* ia1j* ia2j*
>            op95 op00 os95 os00 oh95 oh00 om95 om00
>            jp95 jp00
>            ep95 ep00 ecf95 ecf00
>            jsfs jsfp jsfd esf,
>            i(volume) irr fe cluster(journal);
note: 18 groups (273 obs) dropped because of all zero outcomes
note: ia1journal49 dropped because of collinearity
note: ia2journal49 dropped because of collinearity

Iteration 0:   log likelihood = -109648.95
Iteration 1:   log likelihood = -53417.842
Iteration 2:   log likelihood = -48759.454
Iteration 3:   log likelihood = -48546.574
Iteration 4:   log likelihood = -48545.928
Iteration 5:   log likelihood = -48545.264
Iteration 6:   log likelihood = -48545.041
Iteration 7:   log likelihood = -48544.995
Iteration 8:   log likelihood = -48544.984
Iteration 9:   log likelihood = -48544.982
Iteration 10:  log likelihood = -48544.981
Iteration 11:  log likelihood = -48544.981
Iteration 12:  log likelihood = -48544.981

Conditional fixed-effects Poisson regression    Number of obs     =     14,789
Group variable: volume                          Number of groups  =        957

                                                Obs per group:
                                                              min =         11
                                                              avg =       15.5
                                                              max =         20

                                                Wald chi2(359)    =   69787.73
Log likelihood  = -48544.981                    Prob > chi2       =     0.0000

--------------+----------------------------------------------------------------
           cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
      ip86c86 |   -1.847468    .0530886    -34.80    0.000      -1.95152    -1.743417
      ip86c87 |   -.4381355    .0392306    -11.17    0.000     -.5150261     -.361245
      ip86c88 |     .087579    .0371483      2.36    0.018      .0147696     .1603883
      ip86c89 |    .1807163    .0370119      4.88    0.000      .1081743     .2532583
      ip86c90 |    .2449538    .0369867      6.62    0.000      .1724611     .3174464
      ip86c91 |    .2168323      .03714      5.84    0.000      .1440392     .2896253
      ip86c92 |    .2031593    .0371412      5.47    0.000      .1303639     .2759548
      ip86c93 |    .1751079    .0370237      4.73    0.000      .1025427     .2476731
      ip86c94 |    .1338276    .0367586      3.64    0.000      .0617822     .2058731
      ip86c95 |    .1147785    .0362351      3.17    0.002       .043759     .1857981
      ip86c96 |    .1777819      .03516      5.06    0.000      .1088697     .2466941
      ip86c97 |    .0687113    .0345509      1.99    0.047      .0009928     .1364298
      ip86c98 |    .0469215    .0332107      1.41    0.158     -.0181702     .1120132
      ip86c99 |    .0182466    .0317555      0.57    0.566     -.0439929     .0804862
      ip87c87 |   -1.949733    .0554751    -35.15    0.000     -2.058462    -1.841004
      ip87c88 |   -.3538282    .0381824     -9.27    0.000     -.4286644     -.278992
      ip87c89 |    .1371323    .0359161      3.82    0.000       .066738     .2075265
      ip87c90 |    .2864171    .0353844      8.09    0.000      .2170649     .3557692
      ip87c91 |     .320831    .0352627      9.10    0.000      .2517174     .3899446
      ip87c92 |    .3172166    .0352205      9.01    0.000      .2481857     .3862476
      ip87c93 |    .3136421    .0350967      8.94    0.000      .2448539     .3824303
      ip87c94 |    .2266356    .0350666      6.46    0.000      .1579063     .2953649
      ip87c95 |    .2399688    .0346438      6.93    0.000      .1720682     .3078695
      ip87c96 |    .2509916    .0337448      7.44    0.000       .184853     .3171303
      ip87c97 |    .1490454    .0333531      4.47    0.000      .0836745     .2144164
      ip87c98 |    .1203436    .0322356      3.73    0.000      .0571631     .1835242
      ip87c99 |    .0928098    .0309999      2.99    0.003      .0320511     .1535685
      ip88c88 |   -1.829752    .0506756    -36.11    0.000     -1.929074     -1.73043
      ip88c89 |   -.5110093    .0369701    -13.82    0.000     -.5834694    -.4385491
      ip88c90 |    .0775904    .0339402      2.29    0.022      .0110688      .144112
      ip88c91 |    .1476133    .0334064      4.42    0.000      .0821379     .2130887
      ip88c92 |    .2387655    .0329253      7.25    0.000      .1742331     .3032979
      ip88c93 |    .2456407    .0327014      7.51    0.000      .1815471     .3097343
      ip88c94 |    .1998744    .0325688      6.14    0.000      .1360408      .263708
      ip88c95 |    .2465363    .0321527      7.67    0.000      .1835182     .3095544
      ip88c96 |    .2282065    .0313702      7.27    0.000      .1667221      .289691
      ip88c97 |    .1446409    .0310618      4.66    0.000      .0837609     .2055208
      ip88c98 |    .1509454    .0300523      5.02    0.000      .0920439     .2098469
      ip88c99 |    .0789711    .0291572      2.71    0.007      .0218242     .1361181
      ip89c89 |    -2.21308    .0538703    -41.08    0.000     -2.318664    -2.107496
      ip89c90 |   -.5575589    .0348938    -15.98    0.000     -.6259494    -.4891684
      ip89c91 |   -.0596987    .0319973     -1.87    0.062     -.1224122     .0030149
      ip89c92 |    .0926244    .0309835      2.99    0.003      .0318978     .1533509
      ip89c93 |    .1542054    .0304141      5.07    0.000      .0945949     .2138159
      ip89c94 |    .1492242    .0300918      4.96    0.000      .0902455      .208203
      ip89c95 |    .1751659    .0296674      5.90    0.000      .1170188     .2333129
      ip89c96 |     .180548    .0288583      6.26    0.000      .1239868     .2371092
      ip89c97 |     .065797    .0287968      2.28    0.022      .0093563     .1222377
      ip89c98 |    .0638145    .0279592      2.28    0.022      .0090153     .1186136
      ip89c99 |    .0602404    .0270196      2.23    0.026      .0072829     .1131979
      ip90c90 |   -1.981752    .0481139    -41.19    0.000     -2.076054     -1.88745
      ip90c91 |   -.6176579    .0336611    -18.35    0.000     -.6836325    -.5516833
      ip90c92 |   -.0637411     .030254     -2.11    0.035     -.1230379    -.0044443
      ip90c93 |    .1087994    .0289528      3.76    0.000       .052053     .1655458
      ip90c94 |     .173818    .0281811      6.17    0.000       .118584     .2290521
      ip90c95 |    .1968529    .0276067      7.13    0.000      .1427448      .250961
      ip90c96 |    .2477952    .0267244      9.27    0.000      .1954164      .300174
      ip90c97 |    .1415833    .0264001      5.36    0.000      .0898399     .1933266
      ip90c98 |    .1259019    .0257994      4.88    0.000       .075336     .1764678
      ip90c99 |    .0997491    .0250312      3.98    0.000      .0506889     .1488093
      ip91c91 |   -2.004916    .0474882    -42.22    0.000     -2.097992    -1.911841
      ip91c92 |   -.6070526    .0327977    -18.51    0.000     -.6713349    -.5427703
      ip91c93 |   -.0486919    .0292623     -1.66    0.096     -.1060449     .0086612
      ip91c94 |    .0812722     .027935      2.91    0.004      .0265205     .1360238
      ip91c95 |    .1556972    .0269535      5.78    0.000      .1028692     .2085251
      ip91c96 |    .2152696    .0259395      8.30    0.000      .1644291       .26611
      ip91c97 |    .1355598    .0254305      5.33    0.000      .0857169     .1854027
      ip91c98 |    .1534907    .0247442      6.20    0.000       .104993     .2019884
      ip91c99 |    .1299443    .0240099      5.41    0.000      .0828858     .1770028
      ip92c92 |   -2.031379     .047228    -43.01    0.000     -2.123944    -1.938814
      ip92c93 |   -.5878936    .0321045    -18.31    0.000     -.6508173      -.52497
      ip92c94 |    -.116326    .0287295     -4.05    0.000     -.1726348    -.0600172
      ip92c95 |    .1335458    .0267008      5.00    0.000      .0812132     .1858784
      ip92c96 |    .2262597    .0253387      8.93    0.000      .1765967     .2759227
      ip92c97 |    .1833727    .0247543      7.41    0.000      .1348552     .2318902
      ip92c98 |    .1908673    .0238595      8.00    0.000      .1441036      .237631
      ip92c99 |     .151964    .0231865      6.55    0.000      .1065192     .1974088
      ip93c93 |   -1.967395    .0457258    -43.03    0.000     -2.057016    -1.877774
      ip93c94 |   -.7260656    .0325034    -22.34    0.000     -.7897711    -.6623602
      ip93c95 |   -.1277263    .0281884     -4.53    0.000     -.1829745     -.072478
      ip93c96 |    .1281649    .0258668      4.95    0.000       .077467     .1788629
      ip93c97 |    .1189159    .0248989      4.78    0.000       .070115     .1677168
      ip93c98 |    .1610828    .0239911      6.71    0.000      .1140611     .2081046
      ip93c99 |    .1564096    .0228948      6.83    0.000      .1115366     .2012826
      ip94c94 |   -2.192538    .0469509    -46.70    0.000      -2.28456    -2.100516
      ip94c95 |   -.7606899    .0312183    -24.37    0.000     -.8218767     -.699503
      ip94c96 |   -.1373922    .0267583     -5.13    0.000     -.1898374    -.0849469
      ip94c97 |    .0022451    .0249342      0.09    0.928     -.0466251     .0511153
      ip94c98 |    .1155044    .0235678      4.90    0.000      .0693124     .1616964
      ip94c99 |    .1237427    .0226479      5.46    0.000      .0793537     .1681317
      ip95c95 |    -2.16658    .0462076    -46.89    0.000     -2.257145    -2.076015
      ip95c96 |   -.7989113    .0307719    -25.96    0.000     -.8592231    -.7385996
      ip95c97 |   -.2527662    .0265441     -9.52    0.000     -.3047916    -.2007407
      ip95c98 |   -.0257631    .0248708     -1.04    0.300      -.074509     .0229829
      ip95c99 |    .0449291    .0235899      1.90    0.057     -.0013062     .0911645
      ip86c00 |    .0301567    .0298242      1.01    0.312     -.0282975      .088611
      ip86c01 |   -.0060176    .0279259     -0.22    0.829     -.0607514     .0487162
      ip86c02 |    .0146214    .0256383      0.57    0.568     -.0356289     .0648716
      ip86c03 |    .0504942    .0235547      2.14    0.032      .0043279     .0966605
      ip86c04 |    .0524122    .0221866      2.36    0.018      .0089273     .0958972
      ip87c00 |    .0570082    .0292195      1.95    0.051     -.0002609     .1142773
      ip87c01 |    .0443434    .0274905      1.61    0.107     -.0095371     .0982238
      ip87c02 |    .0483861    .0255063      1.90    0.058     -.0016054     .0983776
      ip87c03 |    .0258912    .0238913      1.08    0.278     -.0209348     .0727173
      ip87c04 |    .0847882    .0223379      3.80    0.000      .0410067     .1285698
      ip88c00 |    .0753853    .0274163      2.75    0.006      .0216503     .1291203
      ip88c01 |     .052271    .0258694      2.02    0.043      .0015679      .102974
      ip88c02 |    .0669893    .0241004      2.78    0.005      .0197534     .1142251
      ip88c03 |    .0750367    .0223549      3.36    0.001      .0312218     .1188516
      ip88c04 |    .0623877     .021271      2.93    0.003      .0206973     .1040781
      ip89c00 |    .0340644    .0254017      1.34    0.180      -.015722     .0838507
      ip89c01 |    .0214912    .0240806      0.89    0.372     -.0257059     .0686883
      ip89c02 |    .0481794    .0224107      2.15    0.032      .0042553     .0921035
      ip89c03 |    .0406717    .0209168      1.94    0.052     -.0003245      .081668
      ip89c04 |    .0467203    .0198033      2.36    0.018      .0079067      .085534
      ip90c00 |    .1007559    .0233016      4.32    0.000      .0550856     .1464261
      ip90c01 |    .0779222    .0221004      3.53    0.000      .0346063     .1212382
      ip90c02 |    .0676018    .0208134      3.25    0.001      .0268084     .1083952
      ip90c03 |    .1146804    .0192079      5.97    0.000      .0770336     .1523272
      ip90c04 |    .0980838    .0182398      5.38    0.000      .0623345      .133833
      ip91c00 |    .1160531    .0224209      5.18    0.000       .072109     .1599973
      ip91c01 |    .0939022     .021251      4.42    0.000       .052251     .1355534
      ip91c02 |    .0666968    .0201232      3.31    0.001      .0272561     .1061376
      ip91c03 |    .0944466    .0186718      5.06    0.000      .0578506     .1310427
      ip91c04 |    .0869559    .0177589      4.90    0.000       .052149     .1217627
      ip92c00 |    .1885172    .0214787      8.78    0.000      .1464197     .2306147
      ip92c01 |    .1300145    .0205637      6.32    0.000      .0897104     .1703186
      ip92c02 |    .1112858    .0194745      5.71    0.000      .0731164     .1494551
      ip92c03 |    .1234946    .0182263      6.78    0.000      .0877717     .1592175
      ip92c04 |    .0937136    .0175144      5.35    0.000      .0593861     .1280411
      ip93c00 |    .1295775    .0212913      6.09    0.000      .0878473     .1713078
      ip93c01 |    .1220578     .020203      6.04    0.000      .0824607      .161655
      ip93c02 |    .1145072    .0190925      6.00    0.000      .0770867     .1519277
      ip93c03 |    .1125827    .0179118      6.29    0.000      .0774762     .1476891
      ip93c04 |    .1198108    .0170614      7.02    0.000       .086371     .1532506
      ip94c00 |    .1305209    .0205074      6.36    0.000       .090327     .1707147
      ip94c01 |    .1301655    .0191859      6.78    0.000      .0925618     .1677693
      ip94c02 |    .0628564    .0183641      3.42    0.001      .0268634     .0988495
      ip94c03 |    .1040515    .0170404      6.11    0.000       .070653     .1374501
      ip94c04 |    .0830857    .0163184      5.09    0.000      .0511022     .1150691
      ip95c00 |    .0592629    .0200942      2.95    0.003       .019879     .0986468
      ip95c01 |    .0749081    .0183806      4.08    0.000      .0388829     .1109334
      ip95c02 |    .0566544    .0174021      3.26    0.001       .022547     .0907617
      ip95c03 |    .0760125    .0164903      4.61    0.000      .0436921     .1083329
      ip95c04 |     .070322    .0159111      4.42    0.000      .0391368     .1015072
  ia1journal2 |   -.0145027    .0092962     -1.56    0.119     -.0327229     .0037175
  ia1journal3 |    .0615323    .0059221     10.39    0.000      .0499252     .0731395
  ia1journal4 |    .0839063    .0071148     11.79    0.000      .0699616      .097851
  ia1journal5 |    .0491512    .0086559      5.68    0.000      .0321858     .0661165
  ia1journal6 |    .0641334    .0060703     10.57    0.000      .0522358      .076031
  ia1journal7 |   -.0053412    .0128082     -0.42    0.677     -.0304449     .0197624
  ia1journal8 |    .0441816     .014263      3.10    0.002      .0162267     .0721366
  ia1journal9 |    .0447077    .0169126      2.64    0.008      .0115597     .0778558
 ia1journal10 |   -.1123326    .0134246     -8.37    0.000     -.1386444    -.0860208
 ia1journal11 |    -.043958    .0084475     -5.20    0.000     -.0605148    -.0274013
 ia1journal12 |   -.0291248    .0146771     -1.98    0.047     -.0578913    -.0003582
 ia1journal13 |     .041234    .0084246      4.89    0.000       .024722     .0577459
 ia1journal14 |   -.0098782    .0090941     -1.09    0.277     -.0277023     .0079459
 ia1journal15 |    .0159848    .0066153      2.42    0.016      .0030191     .0289505
 ia1journal16 |    .0129793    .0130623      0.99    0.320     -.0126223     .0385809
 ia1journal17 |    .0420559    .0115284      3.65    0.000      .0194606     .0646511
 ia1journal18 |   -.2549791      .01848    -13.80    0.000     -.2911991     -.218759
 ia1journal19 |   -.0136424     .018026     -0.76    0.449     -.0489726     .0216878
 ia1journal20 |    .0798087    .0208572      3.83    0.000      .0389293      .120688
 ia1journal21 |    .0546034    .0090954      6.00    0.000      .0367768     .0724301
 ia1journal22 |    .0289918    .0118182      2.45    0.014      .0058286     .0521549
 ia1journal23 |    .0039971    .0125818      0.32    0.751     -.0206629      .028657
 ia1journal24 |    .0081736    .0167404      0.49    0.625     -.0246369     .0409841
 ia1journal25 |    .0981581    .0067156     14.62    0.000      .0849957     .1113205
 ia1journal26 |    .0799622    .0068164     11.73    0.000      .0666023     .0933221
 ia1journal27 |    .1579616     .007754     20.37    0.000       .142764     .1731591
 ia1journal28 |   -.0207919    .0136404     -1.52    0.127     -.0475267     .0059428
 ia1journal29 |   -.0953655    .0229183     -4.16    0.000     -.1402846    -.0504464
 ia1journal30 |    .0899936    .0145059      6.20    0.000      .0615625     .1184247
 ia1journal31 |    .0694757    .0137568      5.05    0.000      .0425129     .0964384
 ia1journal32 |    .0984093    .0063124     15.59    0.000      .0860371     .1107814
 ia1journal33 |    .1333955    .0071638     18.62    0.000      .1193547     .1474363
 ia1journal34 |    .1580742    .0127143     12.43    0.000      .1331547     .1829937
 ia1journal35 |    .0313693    .0070506      4.45    0.000      .0175502     .0451883
 ia1journal36 |    .0634289    .0120291      5.27    0.000      .0398523     .0870055
 ia1journal37 |   -.0083295    .0184703     -0.45    0.652     -.0445307     .0278717
 ia1journal38 |    .0232764     .015098      1.54    0.123      -.006315     .0528679
 ia1journal39 |    .1174875    .0169516      6.93    0.000       .084263     .1507121
 ia1journal40 |    -.319507    .0319017    -10.02    0.000     -.3820332    -.2569809
 ia1journal41 |    .1178057    .0137332      8.58    0.000      .0908892     .1447223
 ia1journal42 |    -.011529    .0215352     -0.54    0.592     -.0537373     .0306792
 ia1journal43 |    .0312251    .0169036      1.85    0.065     -.0019053     .0643555
 ia1journal44 |    .0148038    .0171812      0.86    0.389     -.0188709     .0484784
 ia1journal45 |    .0000773    .0143088      0.01    0.996     -.0279674     .0281219
 ia1journal46 |   -.0220437    .0221364     -1.00    0.319     -.0654302     .0213428
 ia1journal47 |   -.0020751    .0099633     -0.21    0.835     -.0216028     .0174526
 ia1journal48 |   -.1558679    .0235658     -6.61    0.000      -.202056    -.1096797
 ia1journal50 |    .1053229    .0095329     11.05    0.000      .0866387      .124007
 ia1journal51 |    .0419709    .0185278      2.27    0.023       .005657     .0782848
 ia1journal52 |   -.0610249    .0148261     -4.12    0.000     -.0900836    -.0319662
 ia1journal53 |    .0609291    .0186836      3.26    0.001      .0243099     .0975482
 ia1journal54 |   -.0274644    .0131576     -2.09    0.037     -.0532529    -.0016759
 ia1journal55 |    .0176914    .0167291      1.06    0.290      -.015097     .0504797
 ia1journal56 |   -.0451925     .016767     -2.70    0.007     -.0780553    -.0123297
 ia1journal57 |   -.1072875    .0214567     -5.00    0.000     -.1493419    -.0652331
 ia1journal58 |    .0002982    .0146874      0.02    0.984     -.0284885      .029085
 ia1journal59 |    .0606149    .0102651      5.90    0.000      .0404957     .0807341
 ia1journal60 |    .1000054    .0160713      6.22    0.000      .0685062     .1315046
 ia1journal61 |    -.133762    .0203091     -6.59    0.000     -.1735672    -.0939568
 ia1journal62 |    .0571879    .0130392      4.39    0.000      .0316315     .0827443
 ia1journal63 |     .050314    .0076131      6.61    0.000      .0353926     .0652353
 ia1journal64 |    .0439334    .0138787      3.17    0.002      .0167316     .0711352
 ia1journal65 |    .1044065    .0133059      7.85    0.000      .0783274     .1304855
 ia1journal66 |    .0258539    .0088564      2.92    0.004      .0084958     .0432121
 ia1journal67 |   -.0028905    .0119884     -0.24    0.809     -.0263874     .0206064
 ia1journal68 |    .0005254     .007025      0.07    0.940     -.0132434     .0142942
 ia1journal69 |    .0215662    .0112053      1.92    0.054     -.0003958     .0435281
 ia1journal70 |    .0578448    .0126994      4.55    0.000      .0329545     .0827352
 ia1journal71 |    .0337829     .015756      2.14    0.032      .0029017     .0646641
 ia1journal72 |    .0300641    .0140512      2.14    0.032      .0025243     .0576039
 ia1journal73 |    .0014474    .0176006      0.08    0.934     -.0330492     .0359439
 ia1journal74 |    .0935488    .0094802      9.87    0.000      .0749679     .1121296
 ia1journal75 |     .131914    .0126822     10.40    0.000      .1070572     .1567707
 ia1journal76 |    .1373463    .0078208     17.56    0.000      .1220177     .1526748
 ia1journal77 |    .0727447    .0084336      8.63    0.000      .0562152     .0892743
 ia1journal78 |    .0616942    .0085707      7.20    0.000      .0448959     .0784925
 ia1journal79 |    .0790739    .0143752      5.50    0.000      .0508991     .1072487
 ia1journal80 |    .0457686    .0104602      4.38    0.000       .025267     .0662702
 ia1journal81 |    .1496448    .0168895      8.86    0.000      .1165419     .1827476
 ia1journal82 |    -.049168     .020323     -2.42    0.016     -.0890002    -.0093357
 ia1journal83 |    .0004411    .0125065      0.04    0.972     -.0240711     .0249534
 ia1journal84 |   -.0337001    .0136113     -2.48    0.013     -.0603777    -.0070225
 ia1journal85 |    6.451033    267.4685      0.02    0.981     -517.7775     530.6796
 ia1journal86 |    .1166586    .0230533      5.06    0.000       .071475     .1618422
 ia1journal87 |    .1090564    .0129301      8.43    0.000      .0837139     .1343989
 ia1journal88 |    .0404832     .016972      2.39    0.017      .0072186     .0737478
 ia1journal89 |   -.0311894    .0187214     -1.67    0.096     -.0678826     .0055039
 ia1journal90 |   -.0428644    .0096721     -4.43    0.000     -.0618213    -.0239075
 ia1journal91 |   -.0530993    .0217709     -2.44    0.015     -.0957695    -.0104291
 ia1journal92 |     .040556    .0211329      1.92    0.055     -.0008638     .0819758
 ia1journal93 |   -.0121221     .008584     -1.41    0.158     -.0289464     .0047021
 ia1journal94 |   -.3181458    .0187533    -16.96    0.000     -.3549017    -.2813899
 ia1journal95 |    .0215737    .0350369      0.62    0.538     -.0470973     .0902447
 ia1journal96 |   -.0085779     .019324     -0.44    0.657     -.0464521     .0292964
 ia1journal97 |   -.0944276    .0239099     -3.95    0.000     -.1412902     -.047565
 ia1journal98 |    -.034568    .0172575     -2.00    0.045      -.068392    -.0007439
 ia1journal99 |   -.0451673    .0170794     -2.64    0.008     -.0786423    -.0116922
ia1journal100 |    .0327055    .0186373      1.75    0.079     -.0038229     .0692338
  ia2journal2 |   -.0016221     .000584     -2.78    0.005     -.0027667    -.0004776
  ia2journal3 |   -.0024098    .0003215     -7.50    0.000     -.0030399    -.0017797
  ia2journal4 |   -.0038325    .0004125     -9.29    0.000     -.0046409    -.0030241
  ia2journal5 |   -.0020391    .0004774     -4.27    0.000     -.0029747    -.0011035
  ia2journal6 |   -.0027041    .0003356     -8.06    0.000     -.0033618    -.0020464
  ia2journal7 |   -.0035039    .0007748     -4.52    0.000     -.0050224    -.0019853
  ia2journal8 |   -.0008582    .0007628     -1.13    0.261     -.0023532     .0006367
  ia2journal9 |    -.004711     .001057     -4.46    0.000     -.0067827    -.0026393
 ia2journal10 |    .0046056    .0007471      6.16    0.000      .0031414     .0060698
 ia2journal11 |    .0010603    .0004929      2.15    0.031      .0000943     .0020263
 ia2journal12 |    .0031367    .0009466      3.31    0.001      .0012813     .0049921
 ia2journal13 |   -.0021332    .0004727     -4.51    0.000     -.0030597    -.0012068
 ia2journal14 |   -.0006652    .0005276     -1.26    0.207     -.0016992     .0003688
 ia2journal15 |   -.0005915     .000373     -1.59    0.113     -.0013225     .0001395
 ia2journal16 |   -.0008487    .0007268     -1.17    0.243     -.0022733     .0005758
 ia2journal17 |   -.0028468    .0006233     -4.57    0.000     -.0040684    -.0016252
 ia2journal18 |    .0077621    .0011772      6.59    0.000      .0054548     .0100694
 ia2journal19 |   -.0016817    .0010508     -1.60    0.110     -.0037411     .0003778
 ia2journal20 |   -.0074891    .0012888     -5.81    0.000      -.010015    -.0049632
 ia2journal21 |   -.0021465    .0004918     -4.36    0.000     -.0031104    -.0011826
 ia2journal22 |   -.0022237    .0006636     -3.35    0.001     -.0035244     -.000923
 ia2journal23 |   -.0012417    .0007132     -1.74    0.082     -.0026397     .0001562
 ia2journal24 |   -.0032792    .0009963     -3.29    0.001      -.005232    -.0013265
 ia2journal25 |   -.0044534    .0003807    -11.70    0.000     -.0051996    -.0037072
 ia2journal26 |   -.0021113    .0003701     -5.71    0.000     -.0028366     -.001386
 ia2journal27 |   -.0058123    .0004224    -13.76    0.000     -.0066402    -.0049844
 ia2journal28 |    .0018588    .0007743      2.40    0.016      .0003411     .0033765
 ia2journal29 |    .0019358    .0013933      1.39    0.165     -.0007951     .0046667
 ia2journal30 |   -.0030948    .0007935     -3.90    0.000     -.0046501    -.0015395
 ia2journal31 |   -.0026324    .0007993     -3.29    0.001      -.004199    -.0010658
 ia2journal32 |   -.0039373    .0003449    -11.42    0.000     -.0046132    -.0032614
 ia2journal33 |   -.0057713    .0004025    -14.34    0.000     -.0065602    -.0049824
 ia2journal34 |   -.0051712    .0007029     -7.36    0.000     -.0065489    -.0037934
 ia2journal35 |   -.0007343     .000387     -1.90    0.058     -.0014928     .0000241
 ia2journal36 |   -.0040284    .0007026     -5.73    0.000     -.0054054    -.0026514
 ia2journal37 |   -.0044982    .0011939     -3.77    0.000     -.0068382    -.0021581
 ia2journal38 |   -.0037811    .0008942     -4.23    0.000     -.0055338    -.0020285
 ia2journal39 |   -.0032191    .0009133     -3.52    0.000     -.0050092     -.001429
 ia2journal40 |    .0106739    .0020859      5.12    0.000      .0065857     .0147621
 ia2journal41 |   -.0057835    .0007644     -7.57    0.000     -.0072816    -.0042853
 ia2journal42 |   -.0027958    .0013678     -2.04    0.041     -.0054767    -.0001149
 ia2journal43 |    -.001928    .0010516     -1.83    0.067     -.0039892     .0001331
 ia2journal44 |   -.0030783      .00102     -3.02    0.003     -.0050775    -.0010792
 ia2journal45 |   -.0013546    .0008357     -1.62    0.105     -.0029926     .0002834
 ia2journal46 |    -.001615    .0014442     -1.12    0.263     -.0044456     .0012156
 ia2journal47 |     -.00154    .0006005     -2.56    0.010     -.0027169     -.000363
 ia2journal48 |    .0034726    .0014407      2.41    0.016      .0006488     .0062964
 ia2journal50 |   -.0042676    .0005359     -7.96    0.000      -.005318    -.0032172
 ia2journal51 |   -.0028103    .0010756     -2.61    0.009     -.0049185    -.0007021
 ia2journal52 |    .0011482    .0008796      1.31    0.192     -.0005758     .0028721
 ia2journal53 |   -.0031844    .0011069     -2.88    0.004     -.0053539    -.0010149
 ia2journal54 |    .0023691    .0007556      3.14    0.002      .0008882       .00385
 ia2journal55 |   -.0016775    .0009658     -1.74    0.082     -.0035705     .0002154
 ia2journal56 |    .0015961    .0009763      1.63    0.102     -.0003173     .0035096
 ia2journal57 |     .002108    .0013279      1.59    0.112     -.0004946     .0047107
 ia2journal58 |   -.0013112    .0009014     -1.45    0.146     -.0030779     .0004555
 ia2journal59 |   -.0044269     .000603     -7.34    0.000     -.0056088    -.0032449
 ia2journal60 |   -.0022562    .0009028     -2.50    0.012     -.0040256    -.0004868
 ia2journal61 |    .0005763    .0013259      0.43    0.664     -.0020223      .003175
 ia2journal62 |   -.0040883     .000745     -5.49    0.000     -.0055485    -.0026282
 ia2journal63 |   -.0012056    .0004244     -2.84    0.005     -.0020374    -.0003738
 ia2journal64 |   -.0022675    .0008059     -2.81    0.005      -.003847     -.000688
 ia2journal65 |   -.0051136     .000747     -6.85    0.000     -.0065777    -.0036494
 ia2journal66 |    -.001991    .0004978     -4.00    0.000     -.0029668    -.0010153
 ia2journal67 |    .0006414    .0006971      0.92    0.358     -.0007249     .0020078
 ia2journal68 |    .0004079    .0003854      1.06    0.290     -.0003475     .0011634
 ia2journal69 |   -.0008279     .000621     -1.33    0.182      -.002045     .0003892
 ia2journal70 |   -.0049704    .0007433     -6.69    0.000     -.0064272    -.0035136
 ia2journal71 |   -.0055002    .0009796     -5.61    0.000     -.0074203    -.0035801
 ia2journal72 |   -.0021723    .0008152     -2.66    0.008     -.0037701    -.0005745
 ia2journal73 |   -.0002892    .0011254     -0.26    0.797     -.0024949     .0019165
 ia2journal74 |   -.0021423    .0005247     -4.08    0.000     -.0031706    -.0011139
 ia2journal75 |   -.0062597    .0007187     -8.71    0.000     -.0076683     -.004851
 ia2journal76 |   -.0040148    .0004308     -9.32    0.000     -.0048592    -.0031705
 ia2journal77 |   -.0023635    .0004664     -5.07    0.000     -.0032776    -.0014493
 ia2journal78 |   -.0041293    .0004899     -8.43    0.000     -.0050894    -.0031691
 ia2journal79 |   -.0040291    .0008381     -4.81    0.000     -.0056719    -.0023864
 ia2journal80 |   -.0021202    .0005858     -3.62    0.000     -.0032683    -.0009721
 ia2journal81 |   -.0042525    .0009122     -4.66    0.000     -.0060405    -.0024646
 ia2journal82 |    .0034136    .0013846      2.47    0.014      .0006999     .0061273
 ia2journal83 |    .0005543    .0006891      0.80    0.421     -.0007962     .0019049
 ia2journal84 |    .0007587    .0008017      0.95    0.344     -.0008126     .0023299
 ia2journal85 |   -6.876215    267.4628     -0.03    0.979     -531.0937     517.3413
 ia2journal86 |   -.0075444    .0013731     -5.49    0.000     -.0102356    -.0048533
 ia2journal87 |   -.0083343    .0007571    -11.01    0.000     -.0098183    -.0068504
 ia2journal88 |   -.0031592    .0010015     -3.15    0.002     -.0051222    -.0011963
 ia2journal89 |    -.001648    .0011768     -1.40    0.161     -.0039544     .0006584
 ia2journal90 |    -.000964     .000597     -1.61    0.106     -.0021342     .0002061
 ia2journal91 |    .0009441    .0012731      0.74    0.458     -.0015511     .0034394
 ia2journal92 |    -.003681    .0012521     -2.94    0.003      -.006135     -.001227
 ia2journal93 |    -.001256    .0005047     -2.49    0.013     -.0022452    -.0002667
 ia2journal94 |     .015186    .0011894     12.77    0.000      .0128548     .0175171
 ia2journal95 |    -.003544    .0021256     -1.67    0.095     -.0077102     .0006221
 ia2journal96 |    .0003582    .0011241      0.32    0.750     -.0018451     .0025615
 ia2journal97 |    .0008573    .0014239      0.60    0.547     -.0019335      .003648
 ia2journal98 |   -.0021068    .0010634     -1.98    0.048      -.004191    -.0000226
 ia2journal99 |    .0032596    .0009507      3.43    0.001      .0013962      .005123
ia2journal100 |   -.0031425    .0011038     -2.85    0.004     -.0053059     -.000979
         op95 |   -.0479697    .0092623     -5.18    0.000     -.0661234     -.029816
         op00 |    .0111259    .0130422      0.85    0.394     -.0144362     .0366881
         os95 |   -.0108226    .0070941     -1.53    0.127     -.0247268     .0030815
         os00 |   -.0319177    .0091408     -3.49    0.000     -.0498334     -.014002
         oh95 |   -.0236639    .0162306     -1.46    0.145     -.0554752     .0081474
         oh00 |   -.0435129    .0118883     -3.66    0.000     -.0668135    -.0202123
         om95 |   -.0307991    .0114786     -2.68    0.007     -.0532968    -.0083014
         om00 |   -.0496875    .0127385     -3.90    0.000     -.0746546    -.0247204
         jp95 |   -.0041736    .0097826     -0.43    0.670     -.0233471         .015
         jp00 |    .0324299    .0079707      4.07    0.000      .0168076     .0480522
         ep95 |   -.0805757    .0371556     -2.17    0.030     -.1533994     -.007752
         ep00 |   -.0086395     .013074     -0.66    0.509     -.0342641     .0169851
        ecf95 |   -.0413324    .0371719     -1.11    0.266     -.1141881     .0315233
        ecf00 |    .0508878    .0244122      2.08    0.037      .0030407     .0987348
         jsfs |    .0048177    .0012669      3.80    0.000      .0023347     .0073008
         jsfp |    .0026058    .0014214      1.83    0.067     -.0001801     .0053918
         jsfd |    .0066712    .0009009      7.41    0.000      .0049055     .0084369
          esf |   -.0124528    .0054607     -2.28    0.023     -.0231557      -.00175
--------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
--------------+----------------------------------------------------------------
           cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
cit           |
      ip86c86 |    .1576357    .0182313    -15.97    0.000      .1256635     .1977426
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      ip86c91 |    1.242136    .0878642      3.07    0.002       1.08133     1.426855
      ip86c92 |    1.225268    .0871708      2.86    0.004      1.065793     1.408605
      ip86c93 |    1.191375    .0741061      2.82    0.005      1.054634     1.345845
      ip86c94 |    1.143196    .0795854      1.92    0.055      .9973851     1.310323
      ip86c95 |    1.121625    .0766777      1.68    0.093      .9809728     1.282444
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      ip86c98 |     1.04804    .0574422      0.86    0.392      .9412914     1.166894
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      ip87c88 |    .7019956    .0598908     -4.15    0.000       .593901     .8297641
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      ip87c90 |    1.331648    .1088501      3.50    0.000      1.134518      1.56303
      ip87c91 |    1.378273    .1037201      4.26    0.000      1.189266     1.597317
      ip87c92 |      1.3733    .0987326      4.41    0.000      1.192803      1.58111
      ip87c93 |      1.3684    .0971226      4.42    0.000       1.19069     1.572633
      ip87c94 |    1.254373     .091447      3.11    0.002      1.087356     1.447043
      ip87c95 |     1.27121     .081821      3.73    0.000      1.120546      1.44213
      ip87c96 |    1.285299    .0871594      3.70    0.000      1.125336     1.468001
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      ip87c98 |    1.127884      .06392      2.12    0.034      1.009311     1.260388
      ip87c99 |    1.097253    .0574983      1.77    0.077      .9901525     1.215938
      ip88c88 |    .1604533    .0176315    -16.65    0.000      .1293642     .1990138
      ip88c89 |    .5998898    .0578455     -5.30    0.000      .4965841     .7246865
      ip88c90 |     1.08068    .0967186      0.87    0.386        .90681     1.287887
      ip88c91 |    1.159065    .1025398      1.67    0.095      .9745493     1.378515
      ip88c92 |    1.269681    .1120975      2.70    0.007      1.067932     1.509542
      ip88c93 |     1.27844    .1039875      3.02    0.003      1.090044     1.499397
      ip88c94 |    1.221249    .0983049      2.48    0.013      1.043005     1.429954
      ip88c95 |    1.279586     .101315      3.11    0.002      1.095653     1.494396
      ip88c96 |    1.256345    .0955794      3.00    0.003       1.08231     1.458364
      ip88c97 |    1.155624    .0823794      2.03    0.042      1.004936     1.328909
      ip88c98 |    1.162933    .0811554      2.16    0.031       1.01427     1.333386
      ip88c99 |    1.082173    .0705074      1.21    0.225      .9524407     1.229576
      ip89c89 |    .1093633     .016259    -14.89    0.000      .0817191      .146359
      ip89c90 |    .5726051    .0592164     -5.39    0.000      .4675495     .7012661
      ip89c91 |    .9420483    .0912216     -0.62    0.538      .7791994     1.138932
      ip89c92 |     1.09705    .0971223      1.05    0.295      .9222932     1.304919
      ip89c93 |    1.166731    .0980718      1.83    0.067      .9895122     1.375688
      ip89c94 |    1.160933    .0975769      1.78    0.076      .9846082     1.368835
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      ip89c96 |    1.197874    .0882282      2.45    0.014      1.036852     1.383902
      ip89c97 |     1.06801    .0725734      0.97    0.333      .9348339     1.220158
      ip89c98 |    1.065895    .0670018      1.02    0.310      .9423409     1.205648
      ip89c99 |    1.062092    .0644851      0.99    0.321      .9429338     1.196308
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      ip90c92 |    .9382479    .0764942     -0.78    0.434      .7996873     1.100817
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      ip90c98 |    1.134171    .0665384      2.15    0.032      1.010977     1.272377
      ip90c99 |    1.104894    .0649387      1.70    0.090      .9846733     1.239792
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      ip91c92 |    .5449547    .0402196     -8.23    0.000      .4715618     .6297703
      ip91c93 |    .9524746    .0652704     -0.71    0.477      .8327659     1.089391
      ip91c94 |    1.084666     .075965      1.16    0.246      .9455441     1.244258
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      ip91c97 |    1.145178     .076545      2.03    0.043      1.004564     1.305474
      ip91c98 |    1.165897    .0718896      2.49    0.013      1.033177     1.315666
      ip91c99 |    1.138765    .0648782      2.28    0.023      1.018449     1.273295
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      ip92c93 |    .5554961    .0422401     -7.73    0.000       .478581     .6447727
      ip92c94 |     .890185    .0615019     -1.68    0.092      .7774487     1.019269
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      ip92c99 |    1.164118    .0621863      2.84    0.004      1.048399      1.29261
      ip93c93 |    .1398206    .0151896    -18.11    0.000      .1130055     .1729986
      ip93c94 |    .4838087    .0324992    -10.81    0.000      .4241265     .5518893
      ip93c95 |    .8800943    .0509671     -2.21    0.027      .7856612     .9858777
      ip93c96 |     1.13674    .0668747      2.18    0.029      1.012943     1.275668
      ip93c97 |    1.126275    .0665934      2.01    0.044      1.003033     1.264659
      ip93c98 |    1.174782    .0615358      3.08    0.002      1.060159     1.301799
      ip93c99 |    1.169305     .058564      3.12    0.002      1.059976     1.289911
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 ia1journal76 |    1.147225    .0031232     50.45    0.000       1.14112     1.153363
 ia1journal77 |    1.075456    .0031779     24.62    0.000      1.069245     1.081703
 ia1journal78 |    1.063637    .0031863     20.59    0.000       1.05741       1.0699
 ia1journal79 |    1.082284    .0033119     25.84    0.000      1.075812     1.088795
 ia1journal80 |    1.046832    .0029316     16.34    0.000      1.041102     1.052594
 ia1journal81 |    1.161422    .0045723     38.01    0.000      1.152495     1.170418
 ia1journal82 |    .9520212    .0058984     -7.94    0.000      .9405305     .9636523
 ia1journal83 |    1.000441     .002482      0.18    0.859      .9955884     1.005318
 ia1journal84 |    .9668614    .0024596    -13.25    0.000      .9620527     .9716942
 ia1journal85 |    633.3563    321.6874     12.70    0.000      234.0535     1713.883
 ia1journal86 |    1.123736    .0043475     30.15    0.000      1.115247     1.132289
 ia1journal87 |    1.115225    .0042528     28.60    0.000      1.106921     1.123592
 ia1journal88 |    1.041314    .0028351     14.87    0.000      1.035772     1.046885
 ia1journal89 |     .969292    .0027274    -11.08    0.000      .9639612     .9746523
 ia1journal90 |    .9580413    .0031594    -13.00    0.000      .9518689     .9642538
 ia1journal91 |    .9482858    .0018418    -27.34    0.000      .9446828     .9519026
 ia1journal92 |     1.04139    .0041562     10.16    0.000      1.033275     1.049567
 ia1journal93 |     .987951     .002284     -5.24    0.000      .9834845     .9924378
 ia1journal94 |    .7274967    .0028826    -80.29    0.000      .7218689     .7331684
 ia1journal95 |    1.021808    .0034052      6.47    0.000      1.015156     1.028504
 ia1journal96 |    .9914588    .0030628     -2.78    0.005      .9854739     .9974801
 ia1journal97 |    .9098936    .0025309    -33.95    0.000      .9049467     .9148675
 ia1journal98 |    .9660227    .0032534    -10.26    0.000      .9596671     .9724204
 ia1journal99 |    .9558376    .0038888    -11.10    0.000      .9482461     .9634899
ia1journal100 |    1.033246    .0030383     11.12    0.000      1.027308     1.039218
  ia2journal2 |    .9983792    .0001616    -10.02    0.000      .9980626     .9986959
  ia2journal3 |    .9975931    .0001905    -12.62    0.000      .9972199     .9979665
  ia2journal4 |    .9961748    .0002424    -15.75    0.000      .9956998       .99665
  ia2journal5 |     .997963    .0001164    -17.48    0.000      .9977348     .9981912
  ia2journal6 |    .9972996    .0001069    -25.23    0.000      .9970901     .9975091
  ia2journal7 |    .9965023    .0001856    -18.81    0.000      .9961385     .9968662
  ia2journal8 |    .9991421    .0003003     -2.86    0.004      .9985537     .9997309
  ia2journal9 |    .9953001    .0001881    -24.93    0.000      .9949316     .9956687
 ia2journal10 |    1.004616    .0002088     22.16    0.000      1.004207     1.005026
 ia2journal11 |    1.001061    .0001809      5.87    0.000      1.000706     1.001416
 ia2journal12 |    1.003142    .0003298      9.54    0.000      1.002495     1.003788
 ia2journal13 |     .997869    .0001099    -19.37    0.000      .9976537     .9980845
 ia2journal14 |     .999335    .0001341     -4.96    0.000      .9990723     .9995978
 ia2journal15 |    .9994087    .0001838     -3.22    0.001      .9990484      .999769
 ia2journal16 |    .9991516    .0000755    -11.23    0.000      .9990036     .9992997
 ia2journal17 |    .9971573       .0001    -28.39    0.000      .9969613     .9973532
 ia2journal18 |    1.007792      .00017     46.00    0.000      1.007459     1.008126
 ia2journal19 |    .9983197      .00018     -9.33    0.000       .997967     .9986726
 ia2journal20 |    .9925389    .0001546    -48.07    0.000      .9922359      .992842
 ia2journal21 |    .9978558    .0000993    -21.57    0.000      .9976612     .9980505
 ia2journal22 |    .9977788    .0001245    -17.82    0.000      .9975348     .9980229
 ia2journal23 |     .998759     .000144     -8.61    0.000      .9984768     .9990413
 ia2journal24 |    .9967261    .0001361    -24.01    0.000      .9964594      .996993
 ia2journal25 |    .9955565     .000167    -26.55    0.000      .9952292     .9958839
 ia2journal26 |     .997891    .0001309    -16.10    0.000      .9976345     .9981475
 ia2journal27 |    .9942046    .0001259    -45.91    0.000      .9939579     .9944513
 ia2journal28 |    1.001861    .0001386     13.43    0.000      1.001589     1.002132
 ia2journal29 |    1.001938    .0001817     10.68    0.000      1.001582     1.002294
 ia2journal30 |      .99691    .0001197    -25.78    0.000      .9966754     .9971446
 ia2journal31 |    .9973711    .0002111    -12.44    0.000      .9969574     .9977849
 ia2journal32 |    .9960704    .0001228    -31.94    0.000      .9958298     .9963111
 ia2journal33 |    .9942453    .0001497    -38.32    0.000      .9939519     .9945389
 ia2journal34 |    .9948422    .0001369    -37.57    0.000      .9945739     .9951106
 ia2journal35 |    .9992659    .0001199     -6.12    0.000      .9990309      .999501
 ia2journal36 |    .9959797    .0001504    -26.68    0.000       .995685     .9962746
 ia2journal37 |    .9955119    .0001799    -24.89    0.000      .9951594     .9958646
 ia2journal38 |     .996226    .0001761    -21.38    0.000      .9958808     .9965713
 ia2journal39 |    .9967861    .0003852     -8.33    0.000      .9960314     .9975413
 ia2journal40 |    1.010731    .0002677     40.31    0.000      1.010207     1.011256
 ia2journal41 |    .9942332    .0001653    -34.79    0.000      .9939094     .9945572
 ia2journal42 |    .9972081    .0002118    -13.16    0.000       .996793     .9976233
 ia2journal43 |    .9980738    .0002834     -6.79    0.000      .9975185     .9986295
 ia2journal44 |    .9969264    .0001486    -20.65    0.000      .9966351     .9972177
 ia2journal45 |    .9986463    .0002717     -4.98    0.000       .998114     .9991789
 ia2journal46 |    .9983863    .0002978     -5.41    0.000      .9978028     .9989701
 ia2journal47 |    .9984612    .0005974     -2.57    0.010       .997291     .9996328
 ia2journal48 |    1.003479     .000478      7.29    0.000      1.002542     1.004416
 ia2journal50 |    .9957415    .0002036    -20.87    0.000      .9953425     .9961406
 ia2journal51 |    .9971936    .0002292    -12.22    0.000      .9967444     .9976431
 ia2journal52 |    1.001149    .0003346      3.44    0.001      1.000493     1.001805
 ia2journal53 |    .9968207    .0006473     -4.90    0.000      .9955529     .9980902
 ia2journal54 |    1.002372    .0005244      4.53    0.000      1.001345       1.0034
 ia2journal55 |    .9983239    .0002565     -6.53    0.000      .9978213     .9988267
 ia2journal56 |    1.001597    .0002732      5.85    0.000      1.001062     1.002133
 ia2journal57 |     1.00211    .0002442      8.65    0.000      1.001632     1.002589
 ia2journal58 |    .9986897    .0005295     -2.47    0.013      .9976524      .999728
 ia2journal59 |    .9955829    .0002253    -19.56    0.000      .9951414     .9960247
 ia2journal60 |    .9977463    .0003669     -6.14    0.000      .9970275     .9984657
 ia2journal61 |    1.000576    .0004125      1.40    0.162      .9997683     1.001385
 ia2journal62 |      .99592    .0003689    -11.04    0.000      .9951972     .9966433
 ia2journal63 |    .9987951    .0004454     -2.70    0.007      .9979225     .9996685
 ia2journal64 |    .9977351    .0005401     -4.19    0.000      .9966771     .9987941
 ia2journal65 |    .9948995    .0004992    -10.19    0.000      .9939216     .9958783
 ia2journal66 |    .9980109    .0003729     -5.33    0.000      .9972803     .9987421
 ia2journal67 |    1.000642    .0005344      1.20    0.230      .9995947      1.00169
 ia2journal68 |    1.000408    .0003821      1.07    0.286      .9996593     1.001157
 ia2journal69 |    .9991725    .0003524     -2.35    0.019       .998482     .9998634
 ia2journal70 |    .9950419     .000363    -13.63    0.000      .9943308     .9957536
 ia2journal71 |    .9945149    .0005157    -10.61    0.000      .9935045     .9955263
 ia2journal72 |    .9978301    .0001964    -11.03    0.000      .9974451     .9982152
 ia2journal73 |    .9997108     .000284     -1.02    0.309      .9991543     1.000268
 ia2journal74 |      .99786    .0002292     -9.33    0.000       .997411     .9983092
 ia2journal75 |    .9937599    .0002225    -27.96    0.000      .9933239      .994196
 ia2journal76 |    .9959932    .0001785    -22.40    0.000      .9956434     .9963431
 ia2journal77 |    .9976393    .0002343    -10.06    0.000      .9971802     .9980987
 ia2journal78 |    .9958793    .0003921    -10.49    0.000       .995111     .9966481
 ia2journal79 |     .995979     .000226    -17.75    0.000       .995536     .9964221
 ia2journal80 |    .9978821    .0003288     -6.44    0.000      .9972379     .9985266
 ia2journal81 |    .9957565    .0003066    -13.81    0.000      .9951559     .9963575
 ia2journal82 |    1.003419    .0004439      7.72    0.000       1.00255      1.00429
 ia2journal83 |    1.000554    .0003884      1.43    0.153      .9997935     1.001316
 ia2journal84 |    1.000759    .0001904      3.99    0.000      1.000386     1.001132
 ia2journal85 |     .001032    .0005169    -13.73    0.000      .0003867     .0027544
 ia2journal86 |     .992484    .0003773    -19.85    0.000      .9917447     .9932237
 ia2journal87 |    .9917003    .0002156    -38.33    0.000      .9912778      .992123
 ia2journal88 |    .9968458    .0003759     -8.38    0.000      .9961092     .9975828
 ia2journal89 |    .9983534    .0002401     -6.85    0.000      .9978828     .9988241
 ia2journal90 |    .9990364     .000418     -2.30    0.021      .9982175     .9998561
 ia2journal91 |    1.000945     .000194      4.87    0.000      1.000564     1.001325
 ia2journal92 |    .9963258    .0002057    -17.83    0.000      .9959227      .996729
 ia2journal93 |    .9987448    .0001986     -6.32    0.000      .9983557     .9991341
 ia2journal94 |    1.015302    .0002954     52.20    0.000      1.014723     1.015881
 ia2journal95 |    .9964623    .0002739    -12.89    0.000      .9959255     .9969993
 ia2journal96 |    1.000358     .000373      0.96    0.337      .9996274      1.00109
 ia2journal97 |    1.000858    .0002367      3.62    0.000      1.000394     1.001322
 ia2journal98 |    .9978954    .0002302     -9.13    0.000      .9974444     .9983466
 ia2journal99 |    1.003265    .0005454      6.00    0.000      1.002197     1.004334
ia2journal100 |    .9968625    .0001993    -15.72    0.000      .9964718     .9972532
         op95 |    .9531626    .0185089     -2.47    0.013      .9175674     .9901387
         op00 |    1.011188    .0230737      0.49    0.626      .9669608     1.057438
         os95 |    .9892357    .0198412     -0.54    0.589      .9511022     1.028898
         os00 |    .9685863    .0234459     -1.32    0.187      .9237062     1.015647
         oh95 |    .9766139     .039219     -0.59    0.556      .9026933     1.056588
         oh00 |    .9574202    .0275097     -1.51    0.130      .9049924     1.012885
         om95 |    .9696704    .0271292     -1.10    0.271      .9179296     1.024328
         om00 |    .9515267    .0324345     -1.46    0.145      .8900333     1.017269
         jp95 |    .9958351     .019694     -0.21    0.833      .9579742     1.035192
         jp00 |    1.032961     .012431      2.69    0.007      1.008882     1.057615
         ep95 |    .9225851    .0485819     -1.53    0.126      .8321153     1.022891
         ep00 |    .9913977     .027466     -0.31    0.755      .9390009     1.046718
        ecf95 |    .9595101    .0529008     -0.75    0.453       .861232     1.069003
        ecf00 |    1.052205    .0506532      1.06    0.290       .957466     1.156318
         jsfs |    1.004829    .0035606      1.36    0.174      .9978749     1.011832
         jsfp |    1.002609    .0038517      0.68    0.498      .9950883     1.010187
         jsfd |    1.006694    .0026849      2.50    0.012      1.001445      1.01197
          esf |    .9876244    .0218519     -0.56    0.574      .9457109     1.031396
--------------+----------------------------------------------------------------
Wald chi2(359) =  3.9e+18                                Prob > chi2 =   0.0000

. * Stats for elasticities;
. summ jsfs if jsfs > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfs |        528    7.662178    4.757079        .31      18.98

. summ jsfp if jsfp > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfp |        202    11.37287    5.063211        .31      18.98

. summ jsfd if jsfd > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfd |      1,289    9.265237    5.970646        .31      18.98

. summ esf  if esf  > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
         esf |        745    2.160846    .9016579        .55       5.07

. **********************************************************************;
. *** 1996-2005                                                      ***;
. **********************************************************************;
. clear;

. use temp_data_subs;

. gen plower = 1996;

. gen pupper = 2005;

. keep if pyear >= plower & pyear <= pupper;
(54,953 observations deleted)

. * Create fixed effects for publication x citation year interactions;
. * Drop the 2005 cyear to avoid multicolinearity with the constant;
. * Don't create variables with pyear after cyear;
. * Do create variables with pyear = cyear since keeping age0 = 1 observations;
. forvalues y = 56/99 {;
  2.    forvalues x = 80/99 {;
  3.       quietly gen ip`y'c`x' = py19`y' * c`x' if
>          (`x' >= `y')
>        & (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 56/99 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip`y'c0`x' = py19`y' * c0`x' if
>          (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 0/5 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip0`y'c0`x' = py200`y' * c0`x' if
>          (`x' >= `y')
>        & (2000 + `y' >= plower)
>        & (2000 + `y' <= pupper);
  4.    };
  5. };

. foreach var of varlist ip* {;
  2.    capture assert !missing(`var');
  3.    if _rc {;
  4.       drop `var';
  5.    };
  6. };

. egen title = group(journal);

. rename journal smournal;

. quietly tabulate title, generate(journal);

. drop title;

. foreach var of varlist journal* {;
  2.    quietly gen ia1`var' = age * `var';
  3.    quietly gen ia2`var' = age2 * `var';
  4.    quietly gen ia3`var' = age3 * `var';
  5.    quietly gen ia4`var' = age4 * `var';
  6. };

. rename smournal journal;

. * avoid multicolinearity by dropping first journal's age profile;
.  drop ia1journal1 ia2journal1 ia3journal1 ia4journal1;

.  * screen for small numbers within digitization categories;
. foreach var in op95 op00 os95 os00 oh95 oh00 om95 om00
>                jp95 jp00
>                ep95 ep00 ecf95 ecf00
>                jsfs_dum jsfp_dum jsfd_dum esf_dum {;
  2.    quietly egen countvar = total(`var' > 0);
  3.    drop if (countvar <= threshold) & (`var' > 0);
  4.    drop countvar;
  5.    };
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(2 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)

. * apply second screen to pick up newly created small categories;
. foreach var in op95 op00 os95 os00 oh95 oh00 om95 om00
>                jp95 jp00
>                ep95 ep00 ecf95 ecf00
>                jsfs_dum jsfp_dum jsfd_dum esf_dum {;
  2.    quietly egen countvar = total(`var' > 0);
  3.    drop if (countvar <= threshold) & (`var' > 0);
  4.    drop countvar;
  5.    };
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)
(0 observations deleted)

. * Run regression;
. xtpqml cit ip* ia1j* ia2j*
>            op95 op00 os95 os00 oh95 oh00 om95 om00
>            jp95 jp00
>            ep95 ep00 ecf95 ecf00
>            jsfs jsfp jsfd esf,
>            i(volume) irr fe cluster(journal);
note: 100 groups (100 obs) dropped because of only one obs per group
note: 18 groups (108 obs) dropped because of all zero outcomes
note: ia1journal49 dropped because of collinearity
note: ia1journal85 dropped because of collinearity
note: ia2journal49 dropped because of collinearity
note: ia2journal85 dropped because of collinearity
note: jp95 dropped because of collinearity
note: esf dropped because of collinearity

Iteration 0:   log likelihood = -63811.306
Iteration 1:   log likelihood = -18880.108
Iteration 2:   log likelihood =  -15006.88
Iteration 3:   log likelihood = -14836.611
Iteration 4:   log likelihood =   -14835.7
Iteration 5:   log likelihood =   -14835.7

Conditional fixed-effects Poisson regression    Number of obs     =      5,290
Group variable: volume                          Number of groups  =        882

                                                Obs per group:
                                                              min =          2
                                                              avg =        6.0
                                                              max =         10

                                                Wald chi2(255)    =   56519.35
Log likelihood  =   -14835.7                    Prob > chi2       =     0.0000

--------------+----------------------------------------------------------------
           cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
      ip96c96 |   -2.413747    .0654167    -36.90    0.000     -2.541962    -2.285533
      ip96c97 |   -.9386552    .0511886    -18.34    0.000     -1.038983    -.8383274
      ip96c98 |   -.3003023    .0480509     -6.25    0.000     -.3944803    -.2061243
      ip96c99 |    -.110115    .0471244     -2.34    0.019     -.2024771    -.0177529
      ip97c97 |     -2.4503    .0651064    -37.64    0.000     -2.577906    -2.322694
      ip97c98 |   -.9140696    .0467368    -19.56    0.000     -1.005672    -.8224672
      ip97c99 |   -.3395766     .042011     -8.08    0.000     -.4219165    -.2572366
      ip98c98 |   -2.448962    .0646279    -37.89    0.000     -2.575631    -2.322294
      ip98c99 |   -.9241293    .0447643    -20.64    0.000     -1.011866    -.8363929
      ip99c99 |   -2.386398    .0637344    -37.44    0.000     -2.511316    -2.261481
      ip96c00 |   -.0114841    .0428162     -0.27    0.789     -.0954024     .0724342
      ip96c01 |    .0618014    .0390418      1.58    0.113      -.014719     .1383219
      ip96c02 |    .0399534    .0343398      1.16    0.245     -.0273513     .1072581
      ip96c03 |    .0884157    .0276321      3.20    0.001      .0342577     .1425738
      ip96c04 |    .0928345    .0197585      4.70    0.000      .0541085     .1315604
      ip97c00 |   -.1378912    .0356517     -3.87    0.000     -.2077673    -.0680151
      ip97c01 |    -.051424    .0319332     -1.61    0.107      -.114012      .011164
      ip97c02 |   -.0007636    .0289094     -0.03    0.979     -.0574249     .0558977
      ip97c03 |    .0722368    .0236807      3.05    0.002      .0258235     .1186502
      ip97c04 |    .0644121    .0181663      3.55    0.000      .0288067     .1000174
      ip98c00 |   -.3801943    .0338166    -11.24    0.000     -.4464736     -.313915
      ip98c01 |   -.1198457    .0286131     -4.19    0.000     -.1759264    -.0637651
      ip98c02 |    -.033592    .0248846     -1.35    0.177     -.0823648     .0151809
      ip98c03 |    .0474904    .0211972      2.24    0.025      .0059446     .0890362
      ip98c04 |    .0817252    .0167466      4.88    0.000      .0489024     .1145481
      ip99c00 |   -1.017728    .0406461    -25.04    0.000     -1.097393    -.9380627
      ip99c01 |   -.3429473    .0302772    -11.33    0.000     -.4022895    -.2836051
      ip99c02 |   -.1135673    .0243791     -4.66    0.000     -.1613494    -.0657852
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        ecf00 |    .0839162    .0421321      1.99    0.046      .0013388     .1664936
         jsfs |    .0079178    .0040008      1.98    0.048      .0000764     .0157592
         jsfp |    .0109377    .0032012      3.42    0.001      .0046634     .0172119
         jsfd |    .0015552    .0009313      1.67    0.095     -.0002701     .0033805
--------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
--------------+----------------------------------------------------------------
           cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
cit           |
      ip96c96 |    .0894794     .008744    -24.70    0.000      .0738827     .1083684
      ip96c97 |    .3911535    .0210779    -17.42    0.000      .3519484     .4347259
      ip96c98 |    .7405943    .0297043     -7.49    0.000      .6846044     .8011632
      ip96c99 |    .8957311    .0373328     -2.64    0.008      .8254691     .9719736
      ip97c97 |    .0862677    .0069238    -30.53    0.000      .0737109     .1009637
      ip97c98 |    .4008894    .0219776    -16.67    0.000      .3600477      .446364
      ip97c99 |    .7120718    .0301377     -8.02    0.000      .6553865     .7736598
      ip98c98 |    .0863832    .0095976    -22.04    0.000      .0694795     .1073993
      ip98c99 |    .3968768    .0199682    -18.37    0.000      .3596077     .4380085
      ip99c99 |    .0919603     .009898    -22.17    0.000      .0744703      .113558
      ip96c00 |    .9885816     .031993     -0.35    0.723      .9278238     1.053318
      ip96c01 |    1.063751    .0273404      2.40    0.016      1.011492      1.11871
      ip96c02 |    1.040762    .0247443      1.68    0.093      .9933769     1.090408
      ip96c03 |    1.092442     .022783      4.24    0.000      1.048689     1.138021
      ip96c04 |     1.09728    .0214111      4.76    0.000      1.056107     1.140058
      ip97c00 |    .8711935    .0298965     -4.02    0.000      .8145245     .9318051
      ip97c01 |    .9498758    .0260579     -1.87    0.061       .900152     1.002346
      ip97c02 |    .9992367    .0223897     -0.03    0.973      .9563033     1.044098
      ip97c03 |     1.07491    .0236246      3.29    0.001       1.02959     1.122225
      ip97c04 |    1.066532    .0203228      3.38    0.001      1.027434     1.107117
      ip98c00 |    .6837285    .0267975     -9.70    0.000       .633173     .7383206
      ip98c01 |    .8870573    .0279265     -3.81    0.000      .8339768     .9435161
      ip98c02 |     .966966    .0262814     -1.24    0.216      .9168034     1.019873
      ip98c03 |    1.048636    .0187462      2.66    0.008      1.012531     1.086029
      ip98c04 |    1.085158    .0198492      4.47    0.000      1.046943     1.124767
      ip99c00 |    .3614153    .0196327    -18.74    0.000      .3249134     .4020178
      ip99c01 |    .7096756    .0309459     -7.86    0.000      .6515423     .7729959
      ip99c02 |    .8926441    .0300164     -3.38    0.001      .8357098     .9534571
      ip99c03 |    .9793849    .0271512     -0.75    0.452      .9275894     1.034073
      ip99c04 |    1.029757    .0234853      1.29    0.199      .9847401     1.076831
      ip00c00 |    .0914507    .0093849    -23.31    0.000      .0747885      .111825
      ip00c01 |    .4089876    .0187849    -19.47    0.000      .3737785     .4475135
      ip00c02 |    .7576792    .0204716    -10.27    0.000      .7185995     .7988842
      ip00c03 |    .9736473    .0230166     -1.13    0.259      .9295647     1.019821
      ip00c04 |    1.038562    .0207486      1.89    0.058      .9986818     1.080036
      ip01c01 |    .0908273    .0097097    -22.44    0.000      .0736581     .1119985
      ip01c02 |    .4224358    .0147265    -24.72    0.000      .3945363     .4523082
      ip01c03 |    .7864152    .0214039     -8.83    0.000      .7455636     .8295052
      ip01c04 |     .976195    .0206761     -1.14    0.255      .9365001     1.017572
      ip02c02 |    .1144157     .011615    -21.36    0.000      .0937724     .1396034
      ip02c03 |    .4962808    .0169746    -20.48    0.000      .4641019     .5306909
      ip02c04 |    .8564839    .0176115     -7.53    0.000      .8226523     .8917067
      ip03c03 |     .149019      .01283    -22.11    0.000      .1258798     .1764117
      ip03c04 |    .6143394    .0164528    -18.19    0.000      .5829242     .6474476
      ip04c04 |    .2600957     .024417    -14.35    0.000      .2163839     .3126377
  ia1journal2 |     .943588    .0050962    -10.75    0.000      .9336524     .9536294
  ia1journal3 |    .9593504    .0098406     -4.05    0.000      .9402558     .9788328
  ia1journal4 |     1.01509    .0136548      1.11    0.266      .9886772     1.042209
  ia1journal5 |    1.086825    .0151576      5.97    0.000       1.05752     1.116944
  ia1journal6 |    1.022244    .0107668      2.09    0.037      1.001358     1.043566
  ia1journal7 |    .9679028    .0121576     -2.60    0.009      .9443653     .9920269
  ia1journal8 |    1.075813    .0157728      4.98    0.000      1.045339     1.107176
  ia1journal9 |    1.014289    .0120365      1.20    0.232      .9909704     1.038157
 ia1journal10 |    .7505947    .0129707    -16.60    0.000      .7255982     .7764522
 ia1journal11 |    .9597214    .0175577     -2.25    0.025      .9259186     .9947583
 ia1journal12 |     .936885     .012438     -4.91    0.000      .9128215     .9615829
 ia1journal13 |    .9621974    .0116171     -3.19    0.001      .9396957     .9852379
 ia1journal14 |    1.042632    .0087872      4.95    0.000      1.025551     1.059998
 ia1journal15 |     .952908    .0127945     -3.59    0.000      .9281584     .9783176
 ia1journal16 |    1.024443    .0100045      2.47    0.013      1.005021      1.04424
 ia1journal17 |    .9837592    .0096581     -1.67    0.095      .9650107     1.002872
 ia1journal18 |      .66106    .0106725    -25.64    0.000      .6404697     .6823123
 ia1journal19 |    1.167648    .0158488     11.42    0.000      1.136994     1.199128
 ia1journal20 |     .857154    .0098872    -13.36    0.000      .8379928     .8767534
 ia1journal21 |    1.076549     .015309      5.19    0.000      1.046958     1.106976
 ia1journal22 |    1.065789    .0109738      6.19    0.000      1.044497     1.087516
 ia1journal23 |    1.085214    .0127614      6.95    0.000      1.060488     1.110516
 ia1journal24 |     1.09456     .012133      8.15    0.000      1.071036       1.1186
 ia1journal25 |    1.121028    .0117335     10.92    0.000      1.098265     1.144262
 ia1journal26 |    1.024705    .0135445      1.85    0.065      .9984996     1.051599
 ia1journal27 |     1.16087    .0146799     11.80    0.000      1.132452     1.190001
 ia1journal28 |    .8623201    .0080099    -15.95    0.000       .846763      .878163
 ia1journal29 |     .896886    .0112736     -8.66    0.000      .8750602     .9192562
 ia1journal30 |    .9757068    .0146885     -1.63    0.102      .9473385     1.004925
 ia1journal31 |    .9864637    .0138714     -0.97    0.332      .9596475     1.014029
 ia1journal32 |    1.115832    .0119898     10.20    0.000      1.092579     1.139581
 ia1journal33 |    1.133136    .0135045     10.49    0.000      1.106974     1.159916
 ia1journal34 |    1.281416    .0151491     20.97    0.000      1.252066     1.311454
 ia1journal35 |    1.146145    .0122155     12.80    0.000      1.122451     1.170339
 ia1journal36 |    .9934593    .0084017     -0.78    0.438       .977128     1.010064
 ia1journal37 |    .9195967    .0118011     -6.53    0.000      .8967553     .9430198
 ia1journal38 |    .9095577    .0121377     -7.10    0.000      .8860767     .9336609
 ia1journal39 |    1.124772    .0178562      7.41    0.000      1.090314      1.16032
 ia1journal40 |    .9089465    .0109285     -7.94    0.000      .8877774     .9306204
 ia1journal41 |    1.156402    .0137874     12.19    0.000      1.129693     1.183743
 ia1journal42 |    1.062801    .0137273      4.72    0.000      1.036233     1.090049
 ia1journal43 |    .9806149    .0105418     -1.82    0.069      .9601696     1.001496
 ia1journal44 |    .9151137    .0094885     -8.56    0.000      .8967042      .933901
 ia1journal45 |    1.097427    .0137488      7.42    0.000      1.070808     1.124708
 ia1journal46 |    .9126997    .0126331     -6.60    0.000      .8882722      .937799
 ia1journal47 |    1.067023    .0178087      3.89    0.000      1.032683     1.102504
 ia1journal48 |    .8948959    .0107017     -9.29    0.000      .8741648     .9161187
 ia1journal50 |    .9381191    .0094357     -6.35    0.000      .9198067     .9567961
 ia1journal51 |    1.438892    .0126337     41.44    0.000      1.414343     1.463868
 ia1journal52 |    .9664624    .0154384     -2.14    0.033      .9366725     .9971997
 ia1journal53 |    1.025082    .0159855      1.59    0.112      .9942246     1.056897
 ia1journal54 |    1.055379    .0164819      3.45    0.001      1.023564     1.088182
 ia1journal55 |    1.392286    .0163822     28.13    0.000      1.360545     1.424767
 ia1journal56 |    1.033778    .0125498      2.74    0.006      1.009471      1.05867
 ia1journal57 |    .8886774    .0119774     -8.76    0.000      .8655094     .9124654
 ia1journal58 |    .8862373    .0143913     -7.44    0.000       .858475     .9148974
 ia1journal59 |    .9726965    .0117644     -2.29    0.022      .9499099     .9960298
 ia1journal60 |    1.277542    .0198663     15.75    0.000      1.239192     1.317078
 ia1journal61 |    .9719121     .011888     -2.33    0.020      .9488891     .9954938
 ia1journal62 |    1.137408    .0181923      8.05    0.000      1.102305      1.17363
 ia1journal63 |     .997076    .0166371     -0.18    0.861      .9649952     1.030223
 ia1journal64 |    1.023972    .0164561      1.47    0.140      .9922216     1.056739
 ia1journal65 |    .9479493    .0151825     -3.34    0.001      .9186543     .9781785
 ia1journal66 |    .9224779    .0115413     -6.45    0.000      .9001324     .9453782
 ia1journal67 |    1.054986    .0130845      4.32    0.000       1.02965     1.080945
 ia1journal68 |    .9131832    .0146656     -5.66    0.000      .8848869     .9423844
 ia1journal69 |    .9492307    .0151534     -3.26    0.001      .9199903     .9794004
 ia1journal70 |    1.024691    .0160715      1.56    0.120      .9936702     1.056679
 ia1journal71 |    1.096464    .0178592      5.65    0.000      1.062013     1.132032
 ia1journal72 |    .8946225    .0093758    -10.63    0.000      .8764338     .9131887
 ia1journal73 |    .8387533     .010836    -13.61    0.000      .8177818     .8602627
 ia1journal74 |    1.247254    .0175965     15.66    0.000      1.213238     1.282223
 ia1journal75 |    1.356757    .0198094     20.90    0.000      1.318481     1.396143
 ia1journal76 |    1.207787    .0159617     14.29    0.000      1.176905      1.23948
 ia1journal77 |    1.079834    .0131859      6.29    0.000      1.054297     1.105989
 ia1journal78 |    1.113829    .0176085      6.82    0.000      1.079846     1.148881
 ia1journal79 |    1.259151    .0128392     22.60    0.000      1.234236     1.284569
 ia1journal80 |    .9920687    .0160505     -0.49    0.623      .9611038     1.024031
 ia1journal81 |    1.247804    .0179243     15.41    0.000      1.213163     1.283434
 ia1journal82 |    1.029199    .0097487      3.04    0.002      1.010268     1.048485
 ia1journal83 |    1.025503    .0124856      2.07    0.039      1.001322     1.050269
 ia1journal84 |    1.048991    .0107006      4.69    0.000      1.028227     1.070175
 ia1journal86 |    1.150439    .0183911      8.77    0.000      1.114952     1.187055
 ia1journal87 |    1.071937    .0149016      5.00    0.000      1.043125     1.101545
 ia1journal88 |    1.129505    .0184035      7.47    0.000      1.094005     1.166157
 ia1journal89 |    1.007784    .0092962      0.84    0.401      .9897271     1.026169
 ia1journal90 |    .9640991    .0154967     -2.27    0.023      .9341996     .9949556
 ia1journal91 |    .9175109    .0071518    -11.04    0.000      .9036001     .9316359
 ia1journal92 |    1.187125     .014867     13.70    0.000      1.158341     1.216624
 ia1journal93 |    1.135724    .0133406     10.83    0.000      1.109876     1.162175
 ia1journal94 |    .2879624    .0063749    -56.23    0.000       .275735     .3007322
 ia1journal95 |    1.146958    .0119189     13.19    0.000      1.123833     1.170558
 ia1journal96 |    1.080543    .0171646      4.88    0.000       1.04742     1.114715
 ia1journal97 |     .836968    .0099602    -14.95    0.000      .8176721     .8567191
 ia1journal98 |    .9877712    .0148834     -0.82    0.414      .9590268     1.017377
 ia1journal99 |    .8382026    .0139021    -10.64    0.000      .8113931     .8658978
ia1journal100 |    1.096998    .0151859      6.69    0.000      1.067634      1.12717
  ia2journal2 |    .9987912    .0006009     -2.01    0.044      .9976142     .9999696
  ia2journal3 |    1.007985    .0008882      9.03    0.000      1.006245     1.009727
  ia2journal4 |    1.001132    .0011999      0.94    0.345      .9987827     1.003486
  ia2journal5 |    .9938041    .0014548     -4.25    0.000      .9909568     .9966595
  ia2journal6 |    1.001249    .0009726      1.28    0.199      .9993441     1.003157
  ia2journal7 |    1.000167    .0010099      0.17    0.869      .9981893     1.002148
  ia2journal8 |    .9956859    .0013851     -3.11    0.002       .992975     .9984043
  ia2journal9 |     1.00238    .0012236      1.95    0.052      .9999844     1.004781
 ia2journal10 |    1.015278    .0021414      7.19    0.000       1.01109     1.019484
 ia2journal11 |    1.000602    .0025352      0.24    0.812      .9956456     1.005583
 ia2journal12 |    1.012369    .0015395      8.08    0.000      1.009357     1.015391
 ia2journal13 |    1.006567    .0012374      5.32    0.000      1.004145     1.008996
 ia2journal14 |    .9932233    .0008424     -8.02    0.000      .9915735     .9948757
 ia2journal15 |    1.005397    .0021222      2.55    0.011      1.001246     1.009565
 ia2journal16 |    1.001394    .0009362      1.49    0.136      .9995605      1.00323
 ia2journal17 |    1.004029    .0009262      4.36    0.000      1.002216     1.005846
 ia2journal18 |    1.023231    .0018565     12.66    0.000      1.019599     1.026876
 ia2journal19 |    .9799719    .0013786    -14.38    0.000      .9772735     .9826777
 ia2journal20 |    1.010542     .000998     10.62    0.000      1.008588       1.0125
 ia2journal21 |    .9936802    .0011803     -5.34    0.000      .9913696     .9959961
 ia2journal22 |    .9944136     .000937     -5.95    0.000      .9925789     .9962518
 ia2journal23 |    .9939942    .0013136     -4.56    0.000      .9914229     .9965721
 ia2journal24 |      .98831    .0013506     -8.60    0.000      .9856664     .9909606
 ia2journal25 |    .9953716    .0009497     -4.86    0.000      .9935119     .9972347
 ia2journal26 |    1.002127    .0010016      2.13    0.034      1.000166     1.004092
 ia2journal27 |    .9926599    .0009439     -7.75    0.000      .9908116     .9945116
 ia2journal28 |     1.02132    .0007563     28.49    0.000      1.019839     1.022804
 ia2journal29 |    .9977003    .0008866     -2.59    0.010      .9959641     .9994394
 ia2journal30 |    1.005438    .0018841      2.89    0.004      1.001752     1.009137
 ia2journal31 |    1.006675    .0014913      4.49    0.000      1.003757     1.009603
 ia2journal32 |    .9951709    .0009205     -5.23    0.000      .9933684     .9969767
 ia2journal33 |     .994147    .0009261     -6.30    0.000      .9923336     .9959637
 ia2journal34 |    .9781002    .0008735    -24.80    0.000      .9763897     .9798137
 ia2journal35 |    .9896745    .0009313    -11.03    0.000      .9878509     .9915015
 ia2journal36 |    1.003398    .0006295      5.41    0.000      1.002165     1.004632
 ia2journal37 |    .9998564    .0009554     -0.15    0.881      .9979855     1.001731
 ia2journal38 |    1.002775    .0009871      2.82    0.005      1.000842     1.004712
 ia2journal39 |    .9922399    .0011161     -6.93    0.000      .9900548     .9944299
 ia2journal40 |    .9745984    .0011051    -22.69    0.000      .9724348     .9767668
 ia2journal41 |    .9860725    .0009479    -14.59    0.000      .9842163     .9879322
 ia2journal42 |    .9816858    .0010184    -17.82    0.000      .9796919     .9836838
 ia2journal43 |    .9991164    .0007819     -1.13    0.259       .997585      1.00065
 ia2journal44 |    1.003131    .0008452      3.71    0.000      1.001476     1.004789
 ia2journal45 |    .9893986    .0008231    -12.81    0.000      .9877868     .9910131
 ia2journal46 |    1.002735     .001451      1.89    0.059      .9998954     1.005583
 ia2journal47 |    .9944177    .0011517     -4.83    0.000       .992163     .9966775
 ia2journal48 |     1.00506    .0010015      5.07    0.000      1.003099     1.007025
 ia2journal50 |    1.007563    .0007561     10.04    0.000      1.006082     1.009046
 ia2journal51 |    .9615073    .0006195    -60.92    0.000      .9602938     .9627224
 ia2journal52 |    1.005867    .0011549      5.09    0.000      1.003606     1.008133
 ia2journal53 |    .9988072    .0011188     -1.07    0.287      .9966167     1.001002
 ia2journal54 |    1.002344    .0011293      2.08    0.038      1.000133      1.00456
 ia2journal55 |    .9689008    .0007959    -38.46    0.000      .9673421     .9704619
 ia2journal56 |    .9928415     .000819     -8.71    0.000      .9912376     .9944481
 ia2journal57 |    1.004343    .0009691      4.49    0.000      1.002445     1.006244
 ia2journal58 |    1.009929    .0011772      8.48    0.000      1.007625     1.012239
 ia2journal59 |    1.003491    .0011312      3.09    0.002      1.001276      1.00571
 ia2journal60 |    .9881059    .0011302    -10.46    0.000      .9858933     .9903234
 ia2journal61 |    .9935533    .0010122     -6.35    0.000      .9915714     .9955392
 ia2journal62 |    .9888973    .0011118     -9.93    0.000      .9867206     .9910787
 ia2journal63 |    1.000639     .001158      0.55    0.581       .998372     1.002911
 ia2journal64 |    .9957955    .0011562     -3.63    0.000      .9935319     .9980642
 ia2journal65 |    1.001245     .001145      1.09    0.277      .9990036     1.003492
 ia2journal66 |    1.006924    .0010014      6.94    0.000      1.004963     1.008888
 ia2journal67 |    .9963631    .0009381     -3.87    0.000      .9945261     .9982035
 ia2journal68 |    1.013635    .0011612     11.82    0.000      1.011362     1.015914
 ia2journal69 |    1.004571    .0011553      3.97    0.000      1.002309     1.006838
 ia2journal70 |    .9945634    .0011125     -4.87    0.000      .9923853     .9967464
 ia2journal71 |    .9874285    .0011184    -11.17    0.000      .9852389      .989623
 ia2journal72 |    1.011535    .0007798     14.88    0.000      1.010007     1.013064
 ia2journal73 |      1.0168    .0011253     15.05    0.000      1.014597     1.019008
 ia2journal74 |    .9853335    .0010749    -13.54    0.000       .983229     .9874425
 ia2journal75 |     .972984    .0012127    -21.97    0.000      .9706101     .9753637
 ia2journal76 |    .9905251    .0009162    -10.29    0.000      .9887311     .9923224
 ia2journal77 |    .9950614    .0008143     -6.05    0.000      .9934668     .9966586
 ia2journal78 |    .9914789    .0011209     -7.57    0.000      .9892843     .9936783
 ia2journal79 |    .9801535    .0009414    -20.87    0.000      .9783101     .9820004
 ia2journal80 |    1.000651    .0011316      0.58    0.565      .9984353     1.002871
 ia2journal81 |    .9867762    .0009842    -13.35    0.000      .9848491      .988707
 ia2journal82 |    .9946994    .0007908     -6.69    0.000      .9931507     .9962504
 ia2journal83 |     1.00085    .0009742      0.87    0.383      .9989427     1.002761
 ia2journal84 |    .9895915    .0007177    -14.43    0.000      .9881858     .9909991
 ia2journal86 |    .9855705    .0009583    -14.95    0.000      .9836942     .9874505
 ia2journal87 |    .9925119    .0009703     -7.69    0.000       .990612     .9944154
 ia2journal88 |    .9904489    .0011268     -8.44    0.000      .9882429     .9926598
 ia2journal89 |    .9965464    .0006248     -5.52    0.000      .9953226     .9977717
 ia2journal90 |    .9992966    .0011336     -0.62    0.535      .9970773     1.001521
 ia2journal91 |    1.001162    .0004289      2.71    0.007      1.000322     1.002003
 ia2journal92 |    .9823563    .0007531    -23.22    0.000      .9808815     .9838334
 ia2journal93 |    .9848716    .0008104    -18.53    0.000      .9832847     .9864612
 ia2journal94 |    1.124326    .0023415     56.27    0.000      1.119746     1.128925
 ia2journal95 |    .9727327    .0007662    -35.10    0.000      .9712322     .9742355
 ia2journal96 |    .9966287    .0011428     -2.95    0.003      .9943914      .998871
 ia2journal97 |    1.007517    .0008248      9.15    0.000      1.005902     1.009135
 ia2journal98 |    1.000012    .0014444      0.01    0.993       .997185     1.002847
 ia2journal99 |    1.003618    .0011671      3.11    0.002      1.001333     1.005908
ia2journal100 |    .9894463    .0013134     -7.99    0.000      .9868754     .9920239
         op95 |    .9166478    .0464624     -1.72    0.086      .8299605     1.012389
         op00 |    .9374942    .0286256     -2.11    0.035      .8830349     .9953122
         os95 |    .9744634    .0422238     -0.60    0.551      .8951229     1.060836
         os00 |    .9411982    .0297311     -1.92    0.055      .8846934     1.001312
         oh95 |    .8758877      .04898     -2.37    0.018      .7849624     .9773452
         oh00 |    .9337506    .0329372     -1.94    0.052      .8713759      1.00059
         om95 |    .9376691    .0543055     -1.11    0.266       .837051     1.050382
         om00 |     .908879    .0347977     -2.50    0.013      .8431729     .9797053
         jp00 |    1.005111    .0122388      0.42    0.675      .9814077     1.029388
         ep95 |    1.062872    .0766706      0.85    0.398        .92274     1.224286
         ep00 |    1.265943    .1596598      1.87    0.062      .9886928     1.620941
        ecf95 |    1.069913    .0700824      1.03    0.302      .9410063     1.216479
        ecf00 |    1.087538    .0791811      1.15    0.249      .9429103     1.254349
         jsfs |    1.007949      .00263      3.03    0.002      1.002808     1.013117
         jsfp |    1.010998    .0067148      1.65    0.100      .9979223     1.024244
         jsfd |    1.001556    .0010123      1.54    0.124      .9995743     1.003542
--------------+----------------------------------------------------------------
Wald chi2(255) = -7.2e+17                                Prob > chi2 =   1.0000

. * Stats for elasticies;
. summ jsfs if jsfs > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfs |         39    8.484359    6.145283        .46      18.98

. summ jsfp if jsfp > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfp |         25     11.7064    4.683955       4.68      18.98

. summ jsfd if jsfd > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        jsfd |        519    10.93164    6.053766        .46      18.98

. summ esf  if esf  > 0;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
         esf |          0

. *********************************************;
. * Remove temporary files to clean up disk ***;
. *********************************************;
. erase temp_data_subs.dta;

.
end of do-file

. exit, clear