well as the knowledge of new inventors affect the performance of regional innovation systems (RIS). The results suggest … considerable number of incumbent inventors discontinue. We estimated the persistence of knowledge in the inventor networks of nine … German regions using alternative assumptions about knowledge transfer. Based on these estimates, we analyzed how the size and …

research. The empirical analysis clearly indicates the critical role of industry-specific knowledge plays for new. Hence …, strengthening the regional knowledge base should be a key policy that aims at stimulating entrepreneurship in this sector. …