A Century of Work and Leisure
测算了美国过去106年市场工作、家务、上学和休闲的时间，发现适龄人群工作时间基本不变，女性增加抵消了男性减少；人均休闲和终身休闲仅每周增加4-5小时。
We develop comprehensive measures of time spent in market work, home production, schooling, and leisure in the United States for the last 106 years. We find that hours of work for prime age individuals are essentially unchanged, with the rise in women's hours fully compensating for the decline in men's hours. Hours worked by those 14 to 24 years old have declined noticeably, but most of this decline was offset by a rise in hours spent in school. Overall, per capita leisure and average annual lifetime leisure increased by only four or five hours per week during the last 100 years.