Recreational legalization reduced adult cannabis possession arrests by 76% in states without prior decriminalization and by 40% in states that had already decriminalized, with no change in youth arrest rates or racial disparities.
Policymakers, criminal justice reformers, and legalization advocates.
76% fewer adult arrests without prior decriminalization; 40% fewer with
What the researchers found
In 4 states without prior decriminalization, legalization reduced adult arrests by 76.3%. In 5 states with prior decriminalization, legalization still reduced adult arrests by 40.0%. Legalization was not associated with changes in youth arrest rates. Changes in arrest rates did not differ between Black and White individuals.
Why it matters
This provides evidence that legalization achieves arrest reductions beyond what decriminalization alone accomplishes, answering whether the additional step from decriminalization to legalization is justified for criminal justice reform.
The numbers in context
31 states analyzed. Without prior decriminalization: -76.3% adult arrests. With prior decriminalization: -40.0% adult arrests. No change in youth arrests. No change in Black-White arrest disparities.
How the study worked
Quasi-experimental difference-in-differences analysis using FBI Uniform Crime Reporting data for 31 U.S. states from 2010-2019. Compared arrest rate changes in 9 legalizing states (4 without and 5 with prior decriminalization) to 22 non-legalizing states.
What this study cannot tell us
FBI data may have reporting gaps. 2010-2019 period limits generalizability to later-legalizing states. Ecological design cannot account for individual-level factors.
How to read the evidence
Strong quasi-experimental design using FBI data across 31 states with appropriate control groups.
When this study was published
Published in 2022 with data from 2010-2019.
The bigger picture
The finding that legalization did not reduce racial arrest disparities or youth arrests suggests these outcomes require targeted policies beyond legalization itself.
Questions still open
- Why didn't legalization reduce racial arrest disparities? What additional policies are needed to address youth arrests and racial equity?
Common questions
Does legalization reduce arrests beyond decriminalization?
Did legalization reduce racial disparities in arrests?
Read the original research
Association of Recreational Cannabis Legalization With Cannabis Possession Arrest Rates in the US.
JAMA network open, 5(12), e2244922
Citation
Gunadi, Christian; Shi, Yuyan. (2022). Association of Recreational Cannabis Legalization With Cannabis Possession Arrest Rates in the US.. JAMA network open, 5(12), e2244922. https://doi.org/10.1001/jamanetworkopen.2022.44922