NBER (April 2025) posted a quasi-experimental study of the effects of state Medicaid expansions on the mortality of low-income adults. Despite the study abstract’s claims of a 2.5% reduction in mortality (covered in NY Times and elsewhere), the study found much smaller mortality effects that fell short of statistical significance in its main preregistered analysis.
New England Journal of Medicine (June 2024) published an RCT of Communities that Heal, a data-driven program that engaged communities in four states to rapidly deploy evidence-based practices to reduce opioid overdose deaths. This large, high-quality RCT found no discernible impact on opioid overdose deaths over 1 year.
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