[email protected]
Assistant Professor
Columbia University 
Department of Economics 
Faculty Research Fellow
​National Bureau of Economic Research
Nonresident Scholar
​USC Schaeffer Institute for Public Policy & Government Service

Undergoing revisions

Public Procurement vs. Regulated Competition in Selection Markets [PDF, NBERwp 34141]
with Jose Ignacio Cuesta, Revisions Requested by the Journal of Political Economy

Working papers

Heterogeneous Effects of the Affordable Care Act [in preparation, email for a draft]
with Andrea Scalenghe & Joe Orsini
Designing Incentives for Multitasking Agents: Evidence from Payments to Physicians in England [in preparation, email for a draft]
with Filippo Paternollo & Andre Veiga

Published journal articles

Market Design in Regulated Health Insurance Markets: ​Risk Adjustment vs. Subsidies [PDF]
with Liran Einav & Amy Finkelstein
Journal of Political Economy Microeconomics, forthcoming
Polarization and Public Policy: Political Adverse Selection under Obamacare [PDF]
with Leonardo Bursztyn, Jonathan T. Kolstad, Aakaash Rao & Noam Yuchtman
Economic Journal, forthcoming
​Appendix | Data and Replication Files
Estimating Equilibrium in Health Insurance Exchanges: ​Price Competition and Subsidy Design under the ACA [PDF]
Review of Economic Studies, 2025
Appendix | Data and Replication Files
​A Denial a Day Keeps the Doctor Away [PDF]
with Abe Dunn, Joshua D. Gottlieb, Adam Shapiro & Daniel J. Sonnenstuhl
Quarterly Journal of Economics, 2024​ 
Appendix | Data and Replication Files | Download denial rates and estimates of costs of incomplete payments
Centrality Measures in Networks [PDF]
with Francis Block & Matthew O. Jackson
Social Choice and Welfare, 2023
​Nonparametric Estimates of Demand in ​the California Health Insurance Exchange [PDF]
with Alexander Torgovitsky & Hanbin Yang
​Econometrica, 2023
Appendix | Data and Replication Files | Correction to typo in Supplementary Appendix S5
Interactive Epistemology in Simple Dynamic Games ​with a Continuum of Strategies [PDF] 
with Pierpaolo Battigalli
Economic Theory, 2019
The Impact of Market Size and Composition on Health Insurance Premiums: Evidence from the First Year of the ACA [PDF]
with Michael Dickstein, Mark Duggan & Joe Orsini
American Economic Review P&P, 2015
Data and Replication Files
M Statistic Commands: Interpoint Distance Distribution Analysis [PDF]
with Marco Bonetti & Marcello Pagano
Stata Journal, 2011

Work in progress

Robust Risk Adjustment
​with Aaron Banks, Ben Vatter & Matthew Zhan
Counterfactuals in Discrete Choice Models under Flexible Assumptions on Random Utility
with Jonas Lieber & Alexander Torgovitsky
Intermediaries and Market Competition in Health Insurance
with Naoki Aizawa, Honglin Li, Lorenzo Magnolfi & Christopher Sullivan 
Public Option and Equilibrium Hospital Prices
with Kate Ho, Robin Lee & Neale Mahoney 
Asymmetric Information and Credit Rationing in US Corporate Lending
with Nicola Pierri & Yannick Timmer

Older working papers, currently dormant

Socioeconomic Network Heterogeneity and Pandemic Policy Response [PDF]
with M. Akbarpour, C. Cook, A. Marzuoli, S. Mongey, A. Nagaraj, M. Saccarola, S. Vasserman & H. Yang
NBER wp #27374
Regulated age-based pricing in subsidized health insurance: Evidence from the Affordable Care Act [PDF]
with Joe Orsini
BFI Health Economics seriese 2017-02
A Forest Fire Theory of the Duration of a Boom and the Size of a Subsequent Bust [PDF]
with Matthew O. Jackson