The size of the Social Security program as a percentage of output has increased continuously since its inception. The main expansion has been on the extensive margin (number of individuals under the program), rather than on the intensive margin (benefits per old). Most of the increase was not...

expectancy observed during the period accounts for almost none of the change in educational attainment.

An average person born in the United States in the second half of the nineteenth century completed 7 years of schooling and spent 58 hours a week working in the market. By contrast, an average person born at the end of the twentieth century completed 14 years of schooling and spent 40 hours a...

During World War I the birth rate in France fell by 50%. Why? I build a model of fertility choices where the war implies a positive probability that a wife remains alone, a partially-compensated loss of a husband's income, and a temporary decline in productivity followed by faster growth. I...