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NATIONAL BUREAU OF ECONOMIC RESEARCH

NBER Publications by Daniela Zapata

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April 2016Impacts of the Affordable Care Act on Health Insurance Coverage in Medicaid Expansion and Non-Expansion States
with Charles Courtemanche, James Marton, Benjamin Ukert, Aaron Yelowitz: w22182
The Affordable Care Act (ACA) aimed to achieve nearly universal health insurance coverage in the United States through a combination of insurance market reforms, mandates, subsidies, health insurance exchanges, and Medicaid expansions, most of which took effect in 2014. This paper estimates the causal effects of the ACA on health insurance coverage using data from the American Community Survey. We utilize difference-in-difference-in-differences models that exploit cross-sectional variation in the intensity of treatment arising from state participation in the Medicaid expansion and local area pre-ACA uninsured rates. This strategy allows us to identify the effects of the ACA in both Medicaid expansion and non-expansion states. Our preferred specification suggests that, at the average pre-tr...
March 2012Does Universal Coverage Improve Health? The Massachusetts Experience
with Charles J. Courtemanche: w17893
In 2006, Massachusetts passed health care reform legislation designed to achieve nearly universal coverage through a combination of insurance market reforms, mandates, and subsidies that later served as the model for national reform. Using data from the Behavioral Risk Factor Surveillance System, we provide evidence that health care reform in Massachusetts led to better overall self-assessed health. Various robustness checks and placebo tests support a causal interpretation of the results. We also document improvements in several determinants of overall health: physical health, mental health, functional limitations, joint disorders, and body mass index. Next, we show that the effects on overall health were strongest among those with low incomes, non-whites, near-elderly adults, and women. ...

Published: Charles J. Courtemanche & Daniela Zapata, 2014. "Does Universal Coverage Improve Health? The Massachusetts Experience," Journal of Policy Analysis and Management, John Wiley & Sons, Ltd., vol. 33(1), pages 36-69, 01. citation courtesy of

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