Selecting the Best Comparison Group and Evaluation Design: A Guidance Document for State Section 1115 Demonstration Evaluations

Selecting the Best Comparison Group and Evaluation Design: A Guidance Document for State Section 1115 Demonstration Evaluations

White Paper
Published: Oct 30, 2020
Publisher: Washington, DC: Mathematica Policy Research
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Associated Project

Supporting CMS Oversight of Medicaid 1115 Demonstrations

Time frame: 2019-2030

Prepared for:

U.S. Department of Health and Human Services, Centers for Medicare & Medicaid Services, Center for Medicaid and CHIP Services

Authors

James D. Reschovsky

Maggie Colby

This guidance document focuses on quantitative impact evaluations, which assess the causal effects of an intervention by comparing outcomes under the demonstration’s policies with an estimate of what would have happened under a counterfactual—that is, what would have happened in the absence of those policies or if the policies had been implemented differently.

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