This paper addresses the issue of school students' part-time employment in the last year of compulsory education, and its impact on educational outcomes. Estimating the causal effect is not straightforward. Firstly, those who obtain part-time employment could have certain unobservable...

We use German administrative and survey data to investigate the heterogeneity of part-time penalties in hourly wages and growth rates. Exploiting tax reforms for identification, we find substantial heterogeneity in part-time wage penalties from -28.3% to -7.2% compared to full-time. The...