Until the early decades of the 20th century, women spent more than 60% of their prime-age years either pregnant or nursing. Since then, the introduction of infant formula reduced women's comparative advantage in infant care, by providing an effective breast milk substitute. In addition, improved...

We document three new facts about gender differences in executive compensation. First, female executives receive a lower share of incentive pay in total compensation relative to males. This difference accounts for 93 percent of the gender gap in total pay. Second, the compensation of female...