Research in wage differentials has a long tradition. Prominent reasons why people make more or less money in the labor market include personal characteristics of the employee (e.g., human capital or gender), job characteristics (working conditions demanding compensating wage differentials), and...

The theory of career mobility (Sicherman and Galor 1990) claims that wage penalties for overeducated workers are compensated by better promotion prospects. A corresponding empirical test by Sicherman (1991), using mobility to an occupation with higher human capital requirements as an indicator...