productivity. We examine mobility in two dimensions: from firm to firm (inter-firm) and from one technical field to another. We … particular we show that: as predicted by evolutionary theory, inventor productivity is a positive determinant of invention value …, inter-firm mobility is a consistently positive determinant of productivity and technological mobility is a negative …

on the determinants of inventor productivity, the relationship between inventor mobility and inventor productivity, and … another firm taking with them part of the knowledge stock of the former employer. Hence, the mobility of key Research …