Reconciling Seemingly Contradictory Results from the Oregon Health Insurance Experiment and the Massachusetts Health Reform

I thank Saumya Chatrath, Neil Christy, Simon Essig Aberg, Ryan Fraser, Aigerim Kabdiyeva, Samuel Moy, Srajal Nayak, Ljubica Ristovska, Sukanya Sravasti, and Matthew Tauzer for excellent research assistance. I extend special thanks to Magne Mogstad and Ed Vytlacil for providing multiple rounds of comments. Joseph Altonji, John Asker, Steve Berry, Christian Brinch, Lasse Brune, Pedro Carneiro, Raj Chetty, Joseph Doyle, Mark Duggan, Caroline Hoxby, Liran Einav, Amy Finkelstein, Matthew Gentzkow, Jonathan Gruber, Atul Gupta, John Ham, Guido Imbens, Dean Karlan, Larry Katz, Pat Kline, Michal Kolesar, Jonathan Levin, Rebecca McKibbin, Sarah Miller, Costas Meghir, Edward Norton, Mark Rosenzweig, Joseph Shapiro, Orie Shelef, Ashley Swanson, Eva Vivalt, David Wilson, and seminar participants at Academia Sinica, AEA Annual Meeting, Annual Health Econometrics Workshop, Berkeley, BU/MIT/Harvard Health Economics, CHES, Chicago Harris, Dartmouth, Duke Fuqua, IFS, LSE, Michigan, NBER Summer Institute, Northwestern, Ohio State, Princeton, Rand, Santa Clara, SMU, Stanford, Stanford GSB, Stanford SITE, Stockholm, UBC, UC Davis, UC Irvine, UConn Development Conference, UCLA Anderson, USC, UT Austin, Yale, Wharton, Wisconsin, and WEAI also provided helpful comments. NSF CAREER Award 1350132 and the Stanford Institute for Economic Policy Research (SIEPR) provided support. This project uses data from the Oregon Health Insurance Experiment, AEARCTR-0000028. I am grateful to the investigators of the Oregon Health Insurance Experiment for making their data publicly available. The views expressed herein are those of the author and do not necessarily reflect the views of the National Bureau of Economic Research.

• randomized controlled trials registry entry
• replication data

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