Despite lower incomes the self-employed often report higher job satisfaction. But this increased job satisfaction only sometimes translates into higher life satisfaction, likely due to the heterogeneous nature of self-employment. By distinguishingdifferent types of self-employment, this paper...

Necessity spin-offs are organized by employees of incumbent firms to escape deterioratingjob conditions. This paper proposes a conceptual model of the spin-off process. Necessityspin-offs are distinguished from opportunity spin-offs on the basis of their triggering events.An empirical analysis...

Based on new data, this paper studies invention disclosure, licensing, and firm formationactivities of Max Planck Institute directors over the time period 1985-2004, and analyzestheir effects on scientists’ publication and citation records. The results are consistent withprior findings that...

Using a new dataset encompassing more than 2,200 inventions made by Max Planck Societyresearchers from 1980 to 2004, we explore how licensee and technology characteristics affectthe licensing and commercialization of technologies from public research. We find noevidence that spin-offs and...

Are college dropouts successful entrepreneurs? Other than anecdotal evidence on illustrious college dropouts who managed to become self-made billionaires, there is only limited empirical evidence to answer this question. This paper addresses this issue by investigating the relationship between...