Working papers

"The Private Provision of Public Services: Evidence from Random Assignment in Medicaid" with D. Macambira, M. Geruso, A. Lollo, and C. Ndumele
Revise and Resubmit at American Economic Review. NBER Working Paper 30390 [Link]

 "The Great Equalizer: Medicare and the Geography of Consumer Financial Strain" with Paul Goldsmith-Pinkham and Maxim Pinkovskiy
Revise and Resubmit at Review of Economics and Statistics. NBER Working Paper 31223 [Link]

"Adverse Selection and Network Design Under Regulated Plan Prices: Evidence from Medicaid" with Amanda Kreider, Tim Layton, and Mark Shepard
Under Review. NBER Working Paper 30719 [Link]

Recently published papers


"After 50 Years, Health Professional Shortage Areas Had No Significant Impact On Mortality Or Physician Density" with Justin Markowski and Chima Ndumele
Health Affairs (2023), 42(11), pp.1507-1516. [Official Link]

"Excess Death Rates for Republican and Democratic Registered Voters in Florida and Ohio During the COVID-19 Pandemic" with Paul Goldsmith-Pinkham and Jason Schwartz
JAMA Internal Medicine (2023), published online July 24, 2023. [Official Link, NBER Link, arXiv Link]
Selected Press: Washington Post [1, 2, 3]; New York Times [1, 2]; Financial Times; NBC News; Slate; The Intercept.

"Association Between Medicare Eligibility at Age 65 Years and In-Hospital Treatment Patterns and Health Outcomes for Patients with Trauma: Regression Discontinuity Approach" with  Deepon Bhaumik, John Scott, and Chima Ndumele
British Medical Journal (2023), published online July 11, 2023. [Official Link

"What Does a Provider Network Do? Evidence from Random Assignment in Medicaid Managed Care".
American Economic Journal: Economic Policy (2023), Vol. 15, No. 1, pp. 473-509. [Official Link, PDF]

"What Difference Does a Health Plan Make? Evidence from Random Plan Assignment in Medicaid" with Tim Layton and Mike Geruso
American Economic Journal: Applied Economics (2023), Vol. 15, No. 3, pp. 341-79 [Official Link, NBER Working Paper 27762]

"Conditional cross-design synthesis estimators for generalizability in Medicaid" with Irina Degtiar, Tim Layton, and Sherri Rose
Biometrics (2023), published online April 5, 2023. [Official Link]

"State-level Variation in Supplemental Maternity Kick Payments in Medicaid Managed care" with Samantha Auty and Jamie Daw
JAMA Internal Medicine (2023), Vol. 183, No. 1, pp. 80-82. [Official Link]

"Risk Adjustment and Promoting Health Equity in Population-Based Payment: Concepts and Evidence" with J. Michael McWilliams, Gabe Weinreb, Lin Ding, Chima Ndumele
Health Affairs (2023), Vol. 42, No. 1, pp. 105-114. [Official Link]

"Long-Term Stability of Coverage Among Michigan Medicaid Beneficiaries: A Cohort Study" with Chima Ndumele, A Lollo, Harlan Krumholz, and M Schlesinger
Annals of Internal Medicine (2023), Vol. 176, No. 1, pp. 22-28. [Official Link]


"Association Between Medicaid Managed Care Coverage of Substance Use Services and Treatment Utilization" with Samantha Auty and Megan Cole
JAMA Health Forum (2022), Vol. 3, No. 8, pp. e222812-e222812. [Official Link]

"Performance metrics of substance use disorder care among Medicaid enrollees in New York, New York" with Margarita Alegria, Irene Falgas-Bague, et al.
JAMA Health Forum (2022), Vol. 3, No. 7, pp. e221771-e221771. [Official Link]

"Disparities in Health Care Spending and Utilization Among Black and White Medicaid Enrollees" with Anthony Lollo, Kate Duchowny, Matthew Lavallee, and Chima D. Ndumele
JAMA Health Forum (2022), Vol. 3, No. 6, pp. e221398-e221398. [Official Link]

"Supporting Innovation in Medicaid Policy—Interventions to Increase Adoption of RCTs" with Julia Smith and Atheendar Venkataramani
New England Journal of Medicine (2022), Vol. 386 (19), pp. 1775-1777. [Official Link]

"Measuring Changes in Disparity Gaps: An Application to Health Insurance" (2022) with Paul Goldsmith-Pinkham, Karen Jiang, and Zirui Song
AEA Papers and Proceedings (2022), Vol. 112, pp. 356-60. [Official Link, PDF]

"In Medicaid Managed Care Networks, Care is Highly Concentrated Among a Small Percentage of Physicians" with Avital B. Ludomirsky, William L. Schpero, Anthony Lollo, Susannah Bernheim, Joseph S. Ross, and Chima D. Ndumele  in Health Affairs (2022), 41(5), pp. 760-768. [Official Link]

"Residual Confounding in Health Plan Performance Assessments: Evidence From Randomization in Medicaid" with J. Michael McWilliams, Anthony Lollo, Janet Eaton, and Chima Ndumele in Annals of Internal Medicine (2022), 175(3), pp. 314-324. [Official Link]


"Evaluation of the Association Between Medicare Eligibility and Excess Deaths During the COVID-19 Pandemic in the US" with Anthony Lollo and Chima Ndumele
JAMA Health Forum (2021), Vol. 2, No. 9, pp. e212861-e212861.

"Changes in racial and ethnic disparities in access to care and health among US adults at age 65 years" with Karen Jiang, Paul Goldsmith-Pinkham,  and Zirui Song
JAMA Internal Medicine (2021), Vol. 181(9), pp.1207-1215.

"Characterization of US Hospital Advertising and Association With Hospital Performance, 2008-2016" with Chima Ndumele, Michael Cohen, Muriel Solberg, and Anthony Lollo JAMA Network Open (2021), 4(7), pp.e2115342-e2115342.

"Out-of-network laboratory test spending, utilization, and prices" with Zirui Song and Timothy Lillehaugen
JAMA (2021), 325(16), pp.1674-1676.

"Out-of-network spending on behavioral health, 2008–2016" with Zirui Song, Timothy Lillehaugen, Susan Busch, and Nicole Benson
Journal of General Internal Medicine (2021), 36(1), pp.232-234.


"Promoting Equitable Access to COVID-19 Vaccines—The Role of Medicaid" with Jason Schwartz and Walter Orenstein
Health Affairs Forefront (2020), September.

"Association of Provider Performance with Changes in Insurance Networks" with Katie Piwnica-Worms, Anthony Lollo, and Chima Ndumele
Journal of general internal medicine (2020), 35(7), pp.1997-2002.

"Out-of-network spending: why growing attention is focused on a small share of medical spending" with William Johnson, Kevin Kennedy, Jean Biniek, and Zirui Song
Health Affairs Forefront (2020), 6(2).

"Out-Of-Network Spending Mostly Declined In Privately Insured Populations With A Few Notable Exceptions From 2008 To 2016" with Zirui Song, William Johnson, Kevin Kennedy, Jean Biniek in Health Affairs (2020), 39(6), pp.1032-1041.

"Comparison of office-based physician participation in Medicaid managed care and health insurance exchange plans in the same US geographic markets" with Anthony Lollo and Chima Ndumele in JAMA Network Open (2020), 3(4), pp.e202727-e202727.