Does Daylight Saving Time Save Energy? Evidence from a Natural Experiment in Indiana

Matthew Kotchen and Laura Grant

The Review of Economics and Statistics, 2011, vol. 93, issue 4, 1172-1185

Abstract: We take advantage of a natural experiment in the state of Indiana to estimate the effect of daylight saving time (DST) on residential electricity consumption. Our main finding is that, contrary to the policy's intent, DST increases electricity demand. The findings are consistent with simulation results that identify a trade-off between reducing demand for lighting and increasing demand for heating and cooling. We estimate a cost to Indiana households of $9 million per year in increased electricity bills. We also estimate social costs of increased pollution emissions between $1.7 to $5.5 million per year. © 2011 The President and Fellows of Harvard College and the Massachusetts Institute of Technology.

Date: 2011
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