NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Molly Frean

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NBER Working Papers and Publications

April 2016Premium Subsidies, the Mandate, and Medicaid Expansion: Coverage Effects of the Affordable Care Act
with Jonathan Gruber, Benjamin D. Sommers: w22213
Using premium subsidies for private coverage, an individual mandate, and Medicaid expansion, the Affordable Care Act (ACA) has increased insurance coverage. We provide the first comprehensive assessment of these provisions’ effects, using the 2012-2015 American Community Survey and a triple-difference estimation strategy that exploits variation by income, geography, and time. Overall, our model explains 60% of the coverage gains in 2014-2015. We find that coverage was moderately responsive to price subsidies, with larger gains in state-based insurance exchanges than the federal exchange. The individual mandate’s exemptions and penalties had little impact on coverage rates. The law increased Medicaid among individuals gaining eligibility under the ACA and among previously-eligible populatio...

Published: Molly Frean & Jonathan Gruber & Benjamin D. Sommers, 2017. "Premium subsidies, the mandate, and Medicaid expansion: Coverage effects of the Affordable Care Act," Journal of Health Economics, vol 53, pages 72-86.

 
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