Faculty of Economics, Kyoto Sangyo University, Motoyama, Kamigamo, Kita-ku, Kyoto 603-8555, Japan.
Econ Hum Biol. 2021 May;41:100986. doi: 10.1016/j.ehb.2021.100986. Epub 2021 Feb 10.
While most individuals spend a substantial amount of time sleeping, Japan is among the developed countries whose residents register the fewest number of hours of sleep. I thus examine the causal effects of sleep on labor productivity, utilizing panel datasets for Japanese men. The potential endogeneity of deciding how many hours to sleep is addressed by using fixed effects panel data models with an instrumental variable estimation technique. Exploiting the annual variation in the average sunshine duration between cities as an instrument, I then show that a one-hour increase in the weekly number of hours of sleep increases the wage rate by up to 6-8% on average. These results suggest that sleep duration could enhance labor productivity.
虽然大多数人会花大量的时间睡觉，但日本是发达国家中居民睡眠时间最短的国家之一。因此，我利用日本男性的面板数据集，考察了睡眠对劳动生产率的因果影响。通过使用固定效应面板数据模型和工具变量估计技术来解决睡眠时间决策的内生性问题。然后，我利用城市间平均日照时间的年度变化作为工具变量，结果表明每周睡眠时间增加一小时，平均工资率会提高 6-8%。这些结果表明，睡眠时间的长短可能会影响劳动生产率。
