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Impatience, Incentives, and Obesity

Listed author(s):
  • Charles J. Courtemanche
  • Garth Heutel
  • Patrick McAlvanah

This paper explores the relationship between time preferences, economic incentives, and body mass index (BMI). Using data from the 1979 cohort of the National Longitudinal Survey of Youth, we first show that greater impatience increases BMI even after controlling for demographic, human capital, and occupational characteristics as well as income and risk preference. Next, we provide evidence of an interaction effect between time preference and food prices, with cheaper food leading to the largest weight gains among those exhibiting the most impatience. The interaction of changing economic incentives with heterogeneous discounting may help explain why increases in BMI have been concentrated amongst the right tail of the distribution, where the health consequences are especially severe. Lastly, we model time-inconsistent preferences by computing individuals'quasi-hyperbolic discounting parameters (β and δ). Both long-run patience (δ) and present-bias (β) predict BMI, suggesting obesity is partly attributable to rational intertemporal tradeoffs but also partly to time inconsistency.

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File URL: http://www.nber.org/papers/w17483.pdf
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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 17483.

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Date of creation: Oct 2011
Publication status: published as "Impatience, Incentives, and Obesity." (with Charles Courtemanche and Patrick McAlvanah), forthcoming, The Economic Journal.
Handle: RePEc:nbr:nberwo:17483
Note: EEE HC HE
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National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.

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