Die Ergebnisse der kürzlich veröffentlichten PISA-Studie (OECD 2001) über den Bildungsstand der jüngeren Generation haben nicht nur zu einem Nachdenken über die Ursachen der für Deutschland sehr enttäuschenden Ergebnisse geführt, sondern auch die Diskussion über die Bedeutung von...

Using newly available data at the firm level, this study provides convincing evidence of the importance of financial constraints in explaining the timing of innovations in the German services sector. Based on a dynamic model of firms' optimal R&D behavior under financial constraints, we estimate...

Endogenous innovation-based models of economic growth incorporate a scale effect predicting that larger economies grow faster and that population growth causes higher productivity growth. Recent models of semi-endogenous growth remove this scale effect but instead imply that productivity growth...

This paper analyzes the influence of Information structure on the process of knowledge accumulation in a differential game of duopolistic R&D competition. By comparing open-loop and feedback Nash equilibria, representing imperfect and perfect information structures, we show that in the feedback...