Consider the following facts. In 1950, the richest countries attained an average of 8 years of schooling whereas the poorest countries 1.3 years, a large 6-fold difference. By 2005, the difference in schooling declined to 2-fold because schooling increased faster in poor than in rich countries....

Low sex ratios are often equated with unfavorable marriage prospects for women, but in France after World War 1, the marriage probability of single females rose 50%, despite a massive drop in the male/female ratio. We conjecture that the war-time birth-rate bust induced an abnormal postwar...

Under the identification strategy that only innovations to productivity can have a permanent impact on labor productivity, Gali (1999) finds that the contribution of productivity shocks to aggregate fluctuations is negligible. More recently, Fisher (2006) extends Galis's identification to allow...