This paper analyzes the optimal response of the social insurance system to a rise in labor market risk. To this end, we develop a tractable macroeconomic model with risk-free physical capital, risky human capital (labor market risk) and unobservable effort choice affecting the distribution of...

We model the sorting of medical students across medical occupations and identify a mechanism that explains the possibility of differential productivity across occupations. The model combines moral hazard and matching of physicians and occupations with pre-matching investments. In equilibrium...

Emigration first increases before decreasing with economic development. This bell-shaped relationship between emigration and development was first hypothesized by the theory of the mobility transition (Zelinsky, 1971). Although several mechanisms have been proposed to explain the upward segment...