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6. Februar 2018

When Health Meets Time Zones: Let there Be Light

Ein Vortrag von Pavel Jelnov (Leibniz Universität Hannover) im Rahmen der Seminarreihe des AB Ökonomie am IOS.
Datum: 6. Februar 2018
Zeit: 13.30 Uhr
Ort: Leibniz-Institut für Ost-und Südosteuropaforschung (IOS), Landshuter Str. 4 (Raum 109)

Let there be light? This paper is concerned with the causal effect of clock on diet and time use. To this end, I utilize a unique natural experiment: twenty years of clock reforms in Russia. Analyzing the 1995-2015 period, I estimate both immediate and lagged effects of clock reforms. Differently from existing papers, which focus on the transition to and from daylight saving time, I utilize permanent shifts in time zones and in borders between them. I use both region-level and individual-level data. The results indicate that, generally speaking, Russians are better off with a later sunrise and sunset: their diet is healthier and they do more sports. They even spend less time cooking and washing dishes. On the other hand, they sleep 25 minutes less for a one-hour shift toward a later sunset. Paradoxically, the feel less safe with the later sunset, probably because they spend more time outside and do it at a later time or because of the darkness at the morning. Finally, I compare Russia with the United States, using the 2007 reform of the daylight saving time. In the U.S., the later daylight is associated with a lower expenditure on fast food but with a higher expenditure on meat and baked goods.