The Timing of Work Over Time
发现美国1970年代初至1990年代初晚间和夜间工作大幅减少，而常规工作日边缘时段的工作增加，且这一变化在高工资群体中更明显，并用模型解释为收入上升导致工人减少夜间工作。
The incidence of evening and night work declined sharply in the United States between the early 1970s and the early 1990s, while the fraction of work performed at the fringes of the traditional regular working day grew. This secular decline did not result from industrial shifts or demographic changes. It was greatest at the upper end of the wage distribution, slowest among workers in the lowest quartile of wages. The observed changes are explained by a model that views evening/night work as a disamenity, with rising real earnings leading workers to shift away from such work in the presence of technical change.