Working Papers

Surprise! Out-of-Network Billing for Emergency Care in the United States. NBER Working Paper No. 23623, 2017In Review (with Fiona Scott Morton and Nathan Shekita). Press coverage: The New York Times, Forbes, and NPR.


Politics and Health Care Spending in the United States. NBER Working Paper No. 23748, 2017. In Review(with Amanda Kowalski, Eleanor Neff-Powell, and Jennifer Wu). Press coverage: The New York Times, Politico, the Wall Street Journal, and the Economist


Is Health Care Shoppable? Evidence from the Consumption of Lower-Limb MRI scans. NBER Working Paper No. 24869In Review(with Michael Chernew, Eugene Larsen-Hallock, and Fiona Scott Morton). Press coverage: The New York Times and Bloomberg.

Published Papers

Hospital Prices Grew Substantially Faster than Physician Prices from 2007 to 2014. Health Affairs, 38(2019) (with Stuart Craig, Martin Gaynor, Nir Harish, Harlan Krumholz, and John Van Reenen).


Spending Growth on the Privately Insured and Medicare Beneficiaries from 2007 to 2014. Health Affairs, 38(2019) (with Stuart Craig, Charles Gray, Martin Gaynor, and John Van Reenen).


The Price Ain’t Right? Hospital Prices and Health Spending on the Privately Insured. Quarterly Journal of Economics, 134(2019): 51-107 (with Stuart Craig, Martin Gaynor, and John Van Reenen). Press coverage: The New York Times, the Wall Street JournalVox, the New Yorker


Competition from Private Surgical Centers Improve Hospitals’ Performance? Evidence from the English National Health Service, Journal of Public Economics, 166(2018): 63-80 (with Steven Gibbons and Matthew Skellern). Press coverage: Financial Times


Out-of-Network Emergency-Physician Bills: An Unwelcome Surprise. New England Journal of Medicine, 374(2016): 1915 – 1918 (with Fiona Scott Morton). Press coverage: The New York Times, the Wall Street Journal, the Washington Post.


Does Hospital Competition Save Lives? Evidence from the English Patient Choice Reforms.  Economic Journal, 121 (2011): 228-260 (with Stephen Gibbons, Simon Jones, and Alistair McGuire). Press coverage: the Guardian, the Financial TimesNew Statesman, the Daily Telegraph, and the Daily Mail.


Equity, Waiting Times, and the NHS Reforms”.  British Medical Journal339(2010): 3264-3271 (with Simon Jones, Julian Le Grand, and Alistair McGuire). Press coverage: The Financial Times

Additional Published Papers

“National Trends in Hospital Readmissions Rates among Medicare Fee-for-Service Survivors of Mitral Valve Surgery, 1999-2010” PLos One, 10(7): 132-40. 2015. (With John Dodson, Yun Wang, Karthik Murugiah, Kumar Dharmarajan, Sabet Hashim, Sudhakar Nuti, Erica Spatz, Nihar Desai, and Harlan Krumholz). 2015. 

“Trend in Hospitalizations among Medicare Survivors of Aortic Valve Replacement in the United States”. Annals of Thoracic Surgery, 99(2): 509-517. (with Marthik Murugiah, Yun Wang, John Dodson, Sudhakar Nuti, Kumar Dharmarajan, Isuru Ranasinghe, and Harlan Krumholz). 2015. 

“Framing health reform”. Health Economics, Policy, and Law, 8(02): 251-257 (With Julian Le Grand). 2013.

“In Defense of Our Research on Competition in England’s National Health Service”. The Lancet, 278(9808): 2064-2065 (Per economic guidelines, authorship was alphabetical: Nicholas Bloom, Martin Gaynor, Stephen Gibbons, Simon Jones, Alistair McGuire, Rodrigo Moreno-Serra, Carol Propper, John Van Reenen and Stephan Seiler). 2011. 

“Making Competition Work in the English NHS: The Case For Maintaining Regulated Prices”. Journal of Health Services Research and Policy, 16(4): 193-195. (With Anita Charlesworth). 2011.