The Impact of Insurance Expansions on the Already Insured: The Affordable Care Act and Medicare

We are grateful to Shooshan Danagoulian, Andrew Goodman-Bacon, Neale Mahoney, Victoria Perez, and several anonymous referees for helpful comments. We would also like to thank Pat Barnes, Clint Carter, and John Sullivan for their assistance in accessing the restricted data used in this project at the Michigan and UCLA Federal Statistical Research Data Centers. Any opinions and conclusions expressed herein are those of the authors and do not necessarily represent the views of the National Center for Health Statistics or the U.S. Census Bureau. All results have been reviewed to ensure that no confidential information is disclosed. In addition, Wherry benefited from facilities and resources provided by the California Center for Population Research at UCLA, which receives core support (R24-HD041022) from the Eunice Kennedy Shriver National Institute of Child Health and Human Development. This research was approved by the University of Michigan IRB (Protocol HUM00103265).. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.

• supplemental appendix

• October 9, 2018