Journal Publications

“More Insurers, Lower Premiums: Evidence from Initial Pricing on the Health Exchanges," with Jonathan Gruber and Christopher Ody, American Journal of Health Economics, Winter 2015: 53-81. Older version available as NBER Working Paper 20140

"Economics at the FTC: Physician Acquisitions, Standard Essential Patents, and Accuracy of Credit Reporting," with Julie Carlson, Beth Freeborn, Pauline Ippolito and Brett Wendling. Review of Industrial Organization, December 2013, 43: 303-326.

"Narrow Networks on the Health Insurance Exchanges: What Do They Look Like and How Do They Affect Pricing: A Case Study of Texas," with Igal Hendel and Nathan Wilson, American Economics Review Papers & Proceedings, May 2015.

"Let them Have Choice: Gains from Shifting away from Employer-Sponsored Health Insurance and Toward an Individual Exchange," with Kate Ho and Mauricio Varela. American Economic Journal: Economic Policy, February 2013,5(1):32-58.

"Paying a Premium on Your Premium? Consolidation in the U.S. Health Insurance Industry" with Mark Duggan and Subramaniam Ramanarayanan. A non-technical summary is here and a discussion of how the research pertains as of 2015 is here. American Economic Review, April 2012, 102(2):1161-1185. Longer version available as NBER Working Paper 15434.

“The Impact of Tort Reform on Employer-Sponsored Health Insurance Premiums,” with Ronen Avraham and Max Schanzenbach, Journal of Law, Economics, and Organizations, October 2012, 28(4). Non-technical NBER Bulletin summary here. Older version available as NBER Working Paper 15371.

"Data Impediments to Empirical Work on Health Insurance Markets," with David Dranove, Frank Limbrock, and Fiona Scott Morton. The B.E. Journal of Economic Analysis & Policy: 11(2) Contributions, Article 8.

"Are Health Insurance Markets Competitive?" American Economic Review, September 2010, 100(4): 1399-1431. Online Appendix here. Non-technical NBER Digest summary here.

"An Individual Healthplan Exchange: Which Employees Would Benefit and Why?" American Economic Review Papers & Proceedings, May 2010.

"Estimation and Identification of Merger Effects: An Application to Hospital Mergers," The Journal of Law & Economics, August 2009, 52: 523-550.

"Regulatory Exploitation and the Market for Corporate Control," with David Dranove, The Journal of Law & Economics, May 2009, 52: 223-250

"Do Report Cards Tell Consumers Anything They Don't Already Know? The Case of Medicare HMOs," with David Dranove, The RAND Journal of Economics, Autumn 2008, 39(3): 790-821. Non-technical NBER Digest summary here.

How Do Hospitals Respond to Price Changes?American Economic Review, December 2005, 95(5): 1525-1541. Non-technical NBER Bulletin summary here.

Games Hospitals Play: Entry Deterrence in Hospital Procedure Markets,” Journal of Economics and Management Strategy, Fall 2005, 14(3): 513-542.

Public Insurance and Child Hospitalizations: Access and Efficiency Effects,” with Jonathan Gruber, Journal of Public Economics, 2005, 89(1): 109-129

Policy Publications

"The Good Merger" with Thomas H. Lee, New England Journal of Medicine, May 28, 2015, 372: 2077-79.

"Hospital Industry Consolidation - Still More to Come?" New England Journal of Medicine, December 11, 2013; DOI: 10.1056/NEJMp1313948.

"Designing Transparency Systems for Medical Care Prices," New England Journal of Medicine, March 10, 2011; 364:894-895.

"A Competitive Process for Procuring Health Services: A Review of Principles with an Application to Cataract Services," SPP Research Paper: The Health Series, 2009. The School of Public Policy, University of Calgary 2(5).

Working Papers

"The Price Effects of Cross-Market Hospital Mergers," with Kate Ho and Robin S. Lee, NBER Working Paper 22106, March 2015.

“Does it Matter if Your Health Insurer is For-Profit? Effects of Ownership on Premiums, Insurance Coverage, and Medical Spending," with Subramaniam Ramanarayanan, November 2013, NBER Working Paper 18286, revision requested by American Economic Journal: Policy

"How Does Competition Impact Quality of Care? A Case Study of the U.S. Dialysis Industry," with David Cutler and Christopher Ody

"When Discounts Raise Costs: The Effect of Prescription Drug Coupons on Generic Utilization and Branded Drug Prices," with Christopher Ody and Matt Schmitt

Research in Progress

"Narrow Networks and Markeplace Premiums: How Low Can You Go?" with Igal Hendel and Nathan Wilson

"Does Price Transparency Make Health Care More Affordable?" with Zack Cooper

Other writing, e.g. opinion pieces and blogs

"The importance of a competitive healthcare sector," about W Va law exempting a hospital merger from antitrust challenges, Charleston Gazette Mail, March 2016

"No Evidence That Insurance Market Consolidation Leads to Greater Innovation," with Chris Ody, Health Affairs Blog, February 2016

Various posts, podcasts, and videos at NEJM Catalyst, ongoing

"The Risks of Insurance Company Mergers," Harvard Business Review, September 2015