Cues for Coordination: Light, Longitude and Letterman
Daniel S. Hamermesh
University of Texas at Austin - Department of Economics; National Bureau of Economic Research (NBER); Institute for the Study of Labor (IZA)
Caitlin Knowles Myers
Middlebury College; Institute for the Study of Labor (IZA)
U.S. Department of Treasury - Office of Comptroller of the Currency
IZA Discussion Paper No. 2060
Market productivity is often greater, and leisure and other household activities more enjoyable, when people perform them simultaneously. Beyond pointing out the positive externalities of synchronicity, economists have not attempted to identify exogenous causes that affect timing. We develop a theory illustrating conditions under which synchronicity will vary and identify three factors - the amount of daylight, the timing of television programming, and the benefits of coordinating work schedules across a large country - that can alter timing. Using the American Time Use Survey for 2003 and 2004, we first show using a natural experiment that abstracts from the impacts of daylight hours and television timing that an exogenous shock to time in one area leads its residents to alter their work schedules to coordinate more closely with people elsewhere. We then show that both television timing and the benefits of coordinating across time zones in the U.S. generally affect the timing of market work and sleep, the two most time-consuming activities people undertake. These impacts do not, however, differ greatly by people's demographic characteristics, suggesting that longitude and television establish social norms that affect everyone.
Number of Pages in PDF File: 32
Keywords: time use, labor supply, synchronous activities, time zones
JEL Classification: J22, E61
Date posted: April 11, 2006
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