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Because I Got High? Recreational Marijuana Legalization's Impact on Opioid Overdose Deaths

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  • Elisha Kwaku Denkyirah
  • Raymond J. March
  • Veeshan Rayamajhee
  • Ryan M. Yonk

Abstract

We examine the effect of recreational marijuana legalization (RML) on opioid overdose deaths. Using several event studies and a two‐way fixed‐effects, difference‐in‐differences approach adapted to the methods developed by Callaway and Sant'Anna, we find a consistent negative relationship between RML and opioid overdose deaths. Our estimates show that RML is associated with a decrease of approximately 3.5 deaths per 100,000 individuals. We also find more significant treatment effects for states that implemented RML earlier. These findings remain consistent through a variety of robustness checks and provide insight for future opioid and marijuana policies.

Suggested Citation

  • Elisha Kwaku Denkyirah & Raymond J. March & Veeshan Rayamajhee & Ryan M. Yonk, 2026. "Because I Got High? Recreational Marijuana Legalization's Impact on Opioid Overdose Deaths," Southern Economic Journal, John Wiley & Sons, vol. 93(1), pages 289-300, July.
    • Handle: RePEc:wly:soecon:v:93:y:2026:i:1:p:289-300
    DOI: 10.1002/soej.12797
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