Let There Be Light: Daylight Saving Time and Road Traffic Collisions

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This paper examines the impact of daylight saving time (DST) on fatal road crashes in Australia. I exploit within year transitions to and from DST in a regression discontinuity in time framework. To examine the long run effect of the policy, I use trials of DST implemented in various states, and a DST extension due to the Sydney Olympics. Neither the transition to or out of DST, nor the long run effects of DST have an impact on fatalities on the road. However, there is evidence of reallocation of accidents over the day due to ambient light.

Original languageEnglish
Pages (from-to)523-545
JournalEconomic Inquiry
Issue number3
Early online date20 Dec 2022
Publication statusPublished - 31 Jul 2023


  • daylight saving time
  • regression discontinuity in time
  • road accidents

ASJC Scopus subject areas

  • Business, Management and Accounting(all)
  • Economics and Econometrics


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