It is well known that poor countries are much less productive in agriculture than in the rest of the economy, and that it is hard to account for these productivity gaps. In this paper, we study US states during 1980–2009. We find that there are large productivity gaps between agriculture...

The objective of this paper is to decompose movements in U.S. wages into movements of skill prices and labor qualities. The idea is to interpret the age-wage profiles of various birth cohorts observed in CPS data through the lens of human capital theory. Theory predicts that age-efficiency...