Links to publications, ungated manuscripts, and press coverage are below.
Regression DD is a weighted average of many "simple" DDs.
Difference-in-Differences with Variation in Treatment Timing
pdf | Appendix | FAQ | Journal of Econometrics (March 2021)
Kids who got Medicaid in the 1960s grew up to be healthier and more productive adults.
The Long-Run Effects of Childhood Insurance Coverage: Medicaid Implementation, Adult Health and Labor Market Outcomes
NBER |pdf | Appendices |American Economic Review, forthcoming (March 2021) Coverage: Vox | Washington Post
Medicaid does not kill people.
Observational Studies of the Effect of Medicaid on Health: Controls Are Not Enough
pdf | Journal of Labor Economics (Volume in Honor of John DiNardo), forthcoming (October 2020)
How researchers should (and should not) use DD to study COVID policies.
Using Difference-in-Differences to Identify Causal Effects of COVID-19 Policies
published | Survey Research Methods , 2020, 14(2)
When it started in 1974, SSI drew many beneficiaries from other welfare programs.
Federalizing Benefits: The Introduction of Supplemental Security Income and the Size of the Safety Net
pdf | published | Journal of Public Economics, 2020, 185.
Medicaid's introduction saved the lives of a lot of children and infants.
Public Insurance and Mortality: Evidence from Medicaid Implementation
pdf | Data Appendix | Results Appendices | published | Journal of Political Economy, 2018, 126(1).
Limits on federal financing in the 1950s made public medical programs smaller not more efficient.
Per Capita Caps in Medicaid: Lessons from the Past
published | New England Journal of Medicine, 2017.
Federally funded health centers saved lives among older adults in the 1960s.
The War on Poverty’s Experiment in Public Medicine: Community Health Centers and the Mortality of Older Americans
NBER |published | American Economic Review, 2015, 105(3)
A book about the research, researchers, data, and politics that defined poverty and anti-poverty policy in the 1950s and 1960s.
Review of The Expert’s War on Poverty (by Romain Huret)
published | Journal of Economic History, 2019, 79(2)
More evidence that the ACA Medicaid expansion did not exacerbate the opioid epidemic.
Causality, Stories, Medicaid, and Opioids
pdf | Statement for the Record, U.S. Senate Committee on Homeland Security & Governmental Affairs, February 1, 2018
The ACA Medicaid expansion did not exacerbate the opioid epidemic.
Did Medicaid Expansion Cause the Opioid Epidemic? There’s Little Evidence That it Did.
published | Health Affairs Blog, August 23, 2017
A book about the history of health equity advocates and their influence on the ACA.
Review of 150 Years of ObamaCare (by Daniel Dawes)
published | Journal of Economic Literature, December, 2016
EITC recipients spend their money on durable goods.
How do EITC Recipients Spend their Refunds?
published | Economic Perspectives, Federal Reserve Bank of Chicago, Vol. 32, Second Quarter 2008
Who Are Temporary Nurses?
published | Economic Perspectives, Federal Reserve Bank of Chicago, Vol. 31, First Quarter 2007