In this paper, the authors survey noncompetitive theories of training. With competitive labor markets, firms never pay for investments in general training, whereas when labor markets are imperfect, firm-sponsored training arises as an equilibrium phenomenon. The authors discuss a variety of...

This article investigates how changing the length of the school year, leaving the basic curriculum unchanged, affects learning and subsequent earnings. I use variation introduced by the West German short school years in 1966-7, which exposed some students to a total of about two thirds of a year...