This paper analyzes the impact of the German autobahn net on the economic performance of German regions. To address endogeneity and reverse causation problems, we use historical instrument variables, i.e. a plan of the railroad net in 1890 and a plan of the autobahn net in 1937. We find a...

In this paper, we study the intertemporal relations within two phases of the venture creation process based on data from administrative data sources. By distinguishing a pre- and post-period, we address two major issues: (1) we identify which factors make people wait to start a venture, and (2)...

This paper provides first evidence on the anatomy of human capital externalities arising from both firm-level and regional human capital. Using panel data from German social security records, both at an individual and aggregated at the plant and regional level, I estimate earnings functions...

This paper provides first evidence on the social returns to education from both firm-level and regional human capital. Using panel data from German social security, both at an individual and aggregated at the plant and regional level, I estimate earnings functions incorporating measures of...

This article tests the theory recently put forward by Edward Lazear that individuals with competence in many skills should have a higher probability of being self-employed than others. The empirical results for Germany support this jack-of-all-trades view.