Adaptation and the Mortality Effects of Temperature Across U.S. Climate Regions
We study heterogeneity in the relationship between temperature and mortality across U.S. climate regions and its implications for climate adaptation. Using exogenous variation in temperature and data on all elderly Medicare beneficiaries from 1992 – 2011, we show that the mortality effect of hot days is much larger in cool ZIP codes than in warm ones and that the opposite is true for cold days. We attribute this heterogeneity to historical climate adaptation. As one adaptive mechanism, air conditioning penetration explains nearly all of the regional heterogeneity in heat-driven morality but not cold-driven mortality. Combining these results with projected changes in local temperature distributions by the end of the century, we show that failure to incorporate climate heterogeneity in temperature effects can lead to mortality predictions that are wrong in sign for both cool and warm climates. Allowing regions to adapt to future climate according to the degree of climate adaptation currently observed across climates yields mortality impacts of climate change that are much lower than those estimated without allowing for adaptation, and possibly even negative.
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|Date of creation:||Mar 2017|
|Contact details of provider:|| Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.|
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- Olivier Deschênes & Michael Greenstone, 2011.
"Climate Change, Mortality, and Adaptation: Evidence from Annual Fluctuations in Weather in the US,"
American Economic Journal: Applied Economics,
American Economic Association, vol. 3(4), pages 152-185, October.
- Olivier Deschênes & Michael Greenstone, 2007. "Climate Change, Mortality, and Adaptation: Evidence from Annual Fluctuations in Weather in the US," Working Papers 0707, Massachusetts Institute of Technology, Center for Energy and Environmental Policy Research.
- Olivier Deschênes & Michael Greenstone, 2007. "Climate Change, Mortality, and Adaptation: Evidence from Annual Fluctuations in Weather in the US," NBER Working Papers 13178, National Bureau of Economic Research, Inc.
- Olivier Deschênes & Enrico Moretti, 2009. "Extreme Weather Events, Mortality, and Migration," The Review of Economics and Statistics, MIT Press, vol. 91(4), pages 659-681, November.
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