We examine two sources of productivity improvement in the specialized industrial clusters. Agglomeration improves the … roductivity of each plant through positive externalities, shifting plant-level productivity distribution to the right. Selection … or that gglomeration promotes faster productivity growth. These findings imply that the plant-selection effect was the …

-size distribution? Do they affect individual city sizes? Do they contribute to the productivity advantage of large cities and the nature …

threshold of productivity. We examine mobility in two dimensions: from firm to firm (inter-firm) and from one technical field to …. In particular we show that: (1) as predicted by evolutionary theory, inventor productivity is a positive determinant of … invention value, (2) inter-firm mobility is a consistently positive determinant of productivity and (3) technological mobility …

measure both Total Factor Productivity (TFP) and Variable Factor Productivity (VFP) indexes. Moreover, in order to remove the … effects of the variables beyond the managerial control the residual Total Factor Productivity (RTFP) and Variable Factor … Productivity (RVFP) indexes have been computed. …