//use file's folder as working directory insheet using "dat_pan_all.csv" tsset idn time xtunitroot breitung nfl if (id==1|id==2|id==3|id==4|id==5|id==6|id==7|id==8|id==9|id==10) & (quarter>=5) & (quarter<=136), lags(3) robust xtunitroot breitung nfl if (id==2|id==3|id==4|id==5|id==6) & (quarter>=5) & (quarter<=136), lags(3) robust xtunitroot breitung nfl if (id==1|id==7|id==8|id==9|id==10) & (quarter>=5) & (quarter<=136), lags(3) robust xtunitroot breitung nfl if (id==1|id==2|id==3|id==4|id==5|id==6|id==7|id==8|id==9|id==10) & (quarter>=5) & (quarter<=136) & (quarter<93), lags(3) robust xtunitroot breitung nfl if (id==1|id==2|id==3|id==4|id==5|id==6|id==7|id==8|id==9|id==10) & (quarter>=5) & (quarter<=136) & (quarter>=93), lags(3) robust xtunitroot breitung nfl if (id==2|id==3|id==4|id==5|id==6) & (quarter>=5) & (quarter<=136) & (quarter<93), lags(3) robust xtunitroot breitung nfl if (id==2|id==3|id==4|id==5|id==6) & (quarter>=5) & (quarter<=136) & (quarter>=93), lags(3) robust xtunitroot breitung nfl if (id==1|id==7|id==8|id==9|id==10) & (quarter>=5) & (quarter<=136) & (quarter<93), lags(3) robust xtunitroot breitung nfl if (id==1|id==7|id==8|id==9|id==10) & (quarter>=5) & (quarter<=136) & (quarter>=93), lags(3) robust