• How are CMMI health policy evaluations addressing non-parallel trends?

    14 days ago - By The Medical Care Blog

    To help determine which health policy changes to the Medicare or Medicaid programs are desirable, the CMS Center for Medicare and Medicaid Innovation relies on formal evaluations, performed by outside contractors, of how smaller scale, typically voluntary, demonstrations and other initiatives impact outcomes of interest. However, determining causal impacts often relies on the key assumption of parallel trends. We can only isolate the treatment impact if the treatment and comparison groups have outcomes evolving in a parallel fashion over time. In this post we report how CMMI evaluations...
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