The labor markets of most industrialized countries are polarized. This means that employment has grown in jobs at the upper and lower tails of the wage distribution, while employment in the middle part of the distribution has stagnated or declined. However, there exists no measure that allows a...

Drawing on newly available panel data, this paper presents an empirical analysis of the wage effects of changing job tasks, assessed for individuals at their workplace. I am therefore able to exploit within-occupation within-individual variation, over time, to study wage returns to cognitive,...