Patent renewal studies reveal a highly rightward-skewed distribution of patent values. Our approach elicits valuations approximating those of the patented invention. This paper focuses on the full-term patents of the application year 1977 held by West German and U.S. residents. The tail of...

German social security records involve an indicator for part-time or full-time work. In 2011, the reporting procedure was changed suggesting that a fraction of worker recorded to be working full-time before the change were in fact part-time workers. This study develops a correction based on...

Despite the importance for socio-economic outcomes, there is an ongoing debate about the stability of personality traits over the life cycle. By disentangling age, period and cohort influences on personality traits, this paper adds to the existing empirical contributions, which often focus on...

This paper uses a new firm panel data set to explore the relationship between R&D and productivity in German manufacturing firms for the period from 1979 to 1989. The results confirm the view that R&D is an important determinant of productivity growth. In the cross-section, the elasticity of...

Advocates of apprenticeship programs often argue as if it is simply a matter of historical accident which has hindered such investment by U.S. firms. This paper explores the structure of incentives undergirding the German system of apprenticeship training. First, we describe three...