We construct a model of firm dynamics with heterogeneous productivity and distortions. The productivity distribution evolves endogenously as the result of the decisions of firms seeking to upgrade their productivity over time. Firms can adopt two strategies toward that end: imitation and...

This study examines the determinants of exit from academic research which occurs when academic researchers move into positions in academe which concentrate on non-research activities such as teaching or administration, or when researchers leave academia and move into industry. Drawing on career...