James Okun
Hi, I'm James! I'm a fifth-year PhD candidate in economics at MIT. I study industrial organization and public economics. I do empirical work to better understand how to design policy in markets with externalities and asymmetric information.
Cambridge, MA
Working papers
Selective Admissions in Nursing Homes: Evidence from a Randomized Audit Study
with Liran Einav, Amy Finkelstein, Jesse Gubb, and Neale Mahoney
October 2026
It has been widely documented that patients in the US who are associated with disadvantaged demographics receive care at lower quality nursing homes. To understand the role that selective admissions may play in contributing to this pattern, we conducted a nationwide audit study of the impact of patient race, payer, and medical condition on responses to about 5,500 availability inquiries sent to about 3,000 nursing homes. We find 10-15% lower availability for Medicaid patients compared to private-pay patients and for patients with Alzheimer's disease compared to those without; these availability gaps generally increase with nursing home quality. We find no statistically significant evidence of differential availability by race. To quantify the implications of these selective admissions practices, we embed the audit study results in a model of constrained nursing home choice. We estimate that if, counterfactually, Medicaid patients had the same choice sets as their private-pay counterparts, they would attend higher quality nursing homes on average, but the private-Medicaid gap in quality would be reduced by only 5-10%. Our results suggest that supply-side availability differences by payer are widespread, but that they are unlikely to be the primary factor behind the observed gap in quality of nursing homes attended.
Racial Differences in Nursing Home Value Added
with Liran Einav, Amy Finkelstein, and Neale Mahoney
Revise and resubmit, Journal of Political Economy Microeconomics
We use detailed data on the evolution of health for about 0.8 million Black and 5.4 million white nursing home patients covered by Medicare between 2011 and 2019 to estimate race-specific value-added measures for more than 8,000 nursing homes in the United States. We estimate that the average nursing home value-added experienced by Black patients is about 30% lower than that received by white patients. Most of this gap reflects differences in value-added experienced by similar Black and white patients within the same nursing home, rather than differences in value-added across the nursing homes they go to.
Work in progress
Public Procurement and Private Product Distribution: Evidence from WIC
with Yuci Zhou
Draft coming soon
Procuring Resilience: Theory and Evidence
with Andrew Komo
Draft coming soon
Publications
Pandemic Schooling Mode and Student Test Scores: Evidence from U.S. School Districts
with Rebecca Jack, Clare Halloran, and Emily Oster
American Economic Review: Insights, June 2023
We estimate the impact of district-level schooling mode (in-person versus hybrid or virtual learning) in the 2020–2021 school year on students' pass rates on standardized tests in grades 3–8 across 11 states. Pass rates declined from 2019 to 2021: an average of 12.8 percentage points in math and 6.8 in English language arts (ELA). Focusing on within-state, within-commuting zone variation in schooling mode, we estimate that districts with full in-person learning had significantly smaller declines (13.4 pp in math, 8.3 in ELA). The value to in-person learning was larger for districts with larger populations of Black students.
Resources
Other work