In this paper, I evaluate potential side effects of the educational expansion in Germany on the learning outcomes of today's students. The educational expansion was a demand shock in the labor market of teachers, which could have thus encouraged individuals with different teaching abilities to...

An aging labor force is often associated with a decreasing innovative performance on aggregate, firm or individual level. Using a regional knowledge production function to explain patenting activity in German districts, we propose to include the effect of age in a twofold specification: First,...

In recent years a number of panel estimators have been suggested for sample selection models, where both the selection equation and the equation of interest contain individual effects which are correlated with the explanatory variables. We review and compare some of these estimators, and apply...

Information about teachers' effectiveness at the hiring stage is particularly scarce despite its importance for personnel decisions. Using the German setting of teacher training, I investigate the relationship of teachers' pre-service cognitive and pedagogical skills as measured by two state...