Human Capital, Effort, and the Sexual Division of Labor
论证专业化人力资本的递增回报导致已婚男女在时间分配和人力资本投资上的分工，并因育儿和家务比休闲更费力，已婚女性在相同市场工时下付出更少努力，从而时薪更低，并倾向于选择要求较低的工作。
Increasing returns from specialized human capital is a powerful force creating a division of labor in the allocation of time and investments in human capital between married men and married women. Moreover, since child care and housework are more effort intensive than leisure and other household activities, married women spend less effort on each hour of market work than married men working the same number of hours. Hence, married women have lower hourly earnings than married men with the same market human capital, and they economize on the effort expended on market work by seeking less demanding jobs. The responsibility of married women for child care and housework has major implications for earnings and occupational differences between men and women.