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Does daylight saving time save electricity? Evidence from Slovakia
The European Union has recently decided to stop the policy of biannual clock changes in 2021. One reason
is that the original rationale for the policy, energy savings, is not supported by a large portion of recent
empirical studies. Whether the new permanent time will be standard time or the former daylight saving time
has not been decided. Evidence on energy savings from daylight saving time is country-specific, and each
country may choose its own time. We examine the effects of the policy in a country for which no studies
on daylight saving exist, Slovakia. Using hourly data from the 2010–2017 period, we apply a difference-indifferences
approach and estimate energy savings to equal 1% of annual electricity consumption. Alternatively,
extrapolating the effect from the results of a previous meta-analysis on different countries, for Slovakia we
obtain a smaller estimate, unlikely to exceed 0.5%. Moreover, our findings suggest that daylight saving time
smooths the electricity demand curve.
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