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The return of sleep

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  • Kajitani, Shinya

Abstract

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.

Suggested Citation

  • Kajitani, Shinya, 2021. "The return of sleep," Economics & Human Biology, Elsevier, vol. 41(C).
    • Handle: RePEc:eee:ehbiol:v:41:y:2021:i:c:s1570677x21000101
    DOI: 10.1016/j.ehb.2021.100986
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    3. Conlin, Andrew & Nerg, Iiro & Ala-Mursula, Leena & Räihä, Tapio & Korhonen, Marko, 2023. "The association between chronotype and wages at mid-age," Economics & Human Biology, Elsevier, vol. 50(C).

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    More about this item

    Keywords

    Labor productivity; Sleep duration; Time use; Wages; Working hours;
    All these keywords.

    JEL classification:

    • I12 - Health, Education, and Welfare - - Health - - - Health Behavior
    • J24 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Human Capital; Skills; Occupational Choice; Labor Productivity
    • J31 - Labor and Demographic Economics - - Wages, Compensation, and Labor Costs - - - Wage Level and Structure; Wage Differentials

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