We quantify firm heterogeneity in skill returns and present direct evidence of worker–firm complementarities. Within a … skill measures. Linking administrative data to test scores we document worker sorting and convex earnings-skill …) Workers with large endowments of a skill populate firms with higher returns to it. Sorting intensifies with the cross …

subsample 1975{1997. It extends the analytical framework of Card and Lemieux (2001) which simultaneously includes skill and age … as important dimensions of heterogeneity. After having identified cohort effects in skill wage premia and in the … evolution of relative employment measures, we estimate elasticities of substitution between employees in three different skill …

' skill in R&D activities and intensity of inputs. Inclusive immigration policy requires inter-sectoral diffusion of ideas …