Many studies document a clear relationship between the supply of marriageable men and marriage rates, but few studies find that the supply of marriageable men affects the number of women who choose to be single mothers. The model presented here addresses this puzzle. Many women view either...

Wage levels and turnover rates are negatively correlated across types of employment, and this fact is often interpreted as evidence that high-wage jobs are rationed. A simple training model illustrates, however, that this correlation may arise because able workers have an incentive to choose...