Christian Pfeifer and Katja Seidel, "Students' time allocation and school performance: A comparison between student jobs, sports and music participation", Journal of Economics and Statistics, forthcoming. We use the Socio-Economic Panel (SOEP), data for years 1984-2014, version 31, SOEP, 2015, doi:10.5684/soep.v31, which is subject to data protection regulation and is not allowed to be uploaded. The data set is available via the Research Data Center of the SOEP (https://www.diw.de/en/diw_02.c.221180.en/research_data_center_soep.html), which also provides all information about data structure and variables. Our Stata do-files include the program code for all of our results presented in the paper and the appendix: 1_school_activities_robustSE: main results using OLS 2_school_activities_robustSE_wyoung: adjusted p-values Westfall-Young-Procedure 3_school_activities_wo_pocketmoney: robustness check without pocket-money as control variable 4_school_activities_oprobit: robustness check using ordered probit