Did people get healthier in Massachusetts after coverage expansion?

Does Universal Coverage Improve Health? The Massachusetts Experience, by Charles J. Courtemanche, Daniela Zapata (NBER):

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 health care reform. Using individual-level data from the Behavioral Risk Factor Surveillance System, we provide evidence that health care reform in Massachusetts led to better overall self-assessed health. An assortment of robustness checks and placebo tests support a causal interpretation of the results. We also document improvements in several determinants of overall health, including physical health, mental health, functional limitations, joint disorders, body mass index, and moderate physical activity. The health effects were strongest among women, minorities, near-elderly adults, and those with incomes low enough to qualify for the law’s subsidies. Finally, we use the reform to instrument for health insurance and estimate a sizeable impact of coverage on health. The effects on coverage were strongest for men, non-black minorities, young adults, and those who qualified for the subsidies, while the effects of coverage were strongest for women, blacks, the near-elderly, and middle-to-upper income individuals.

That’s the abstract. I have not yet read the paper. The evidence is consistent with that from Oregon, as well as what one would expect if lack of coverage of the type now more widely accessible in Massachusetts led to under-use of effective care.

UPDATE: Ezra Klein blogs about the paper here.


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