Nathan Miller

McDonough School of Business and Department of Economics,
Georgetown University

For more information, contact:

  • Kostis Hatzitaskos
  • Kıvanç A. Kırgız
  • W. Robert Majure

or any member of our senior staff.


Nathan Miller is an antitrust expert who consults on high-stakes merger investigations. His research covers industrial organization, finance, and regulation, with a focus on merger investigations, cartels, tacit coordination, and price discrimination. Professor Miller teaches courses to graduate students on strategic pricing, microeconomics, and firm analysis and strategy. Who’s Who Legal has recognized him as a “definite future leader” in the competition field. Global Competition Review recognized Professor Miller to its inaugural list of the world’s most important antitrust academics.

On behalf of the merging parties, Professor Miller analyzed the competitive effects, including upstream and downstream aspects, in the proposed $67 billion acquisition of Express Scripts by Cigna. He has also been retained as an expert witness in merger investigations brought by U.S. and international agencies. Professor Miller’s testimony on behalf of U.S. agencies includes retentions by the Federal Trade Commission to analyze US Foods Inc.’s proposed $1.8 billion acquisition of Services Group of America Inc., as well as Edgewell Personal Care Company’s proposed $1.37 billion acquisition of its competitor, Harry’s Inc.

As a former staff economist for the Antitrust Division of the Department of Justice, Professor Miller assessed an array of complex mergers, notably Bazaarvoice/PowerReviews, AT&T/T-Mobile, and Ticketmaster/Live Nation. For analysis related to the AT&T/T-Mobile merger, he received the Antitrust Division’s Assistant Attorney General (AAG) Award.

Professor Miller’s research has appeared in journals such as the American Economic ReviewEconometrica, the RAND Journal of Economics, the Journal of Finance, and the Journal of Financial Economics. His 2022 coauthored article on market power trends was awarded the Industrial Organization Society’s Robert F. Lanzillotti Prize for the best paper in antitrust economics. Professor Miller also won the Lanzillotti Prize in 2015 for his paper on coordinated effects.

Georgetown University designated Professor Miller a Provost’s Distinguished Associate Professor based on excellence in research, teaching, and service. He serves as a senior policy scholar at the Center for Business and Public Policy at Georgetown’s McDonough School of Business.


Fifteenth Annual Conference on Antitrust Economics and Competition Policy

Press Release

Cornerstone Research Staff and Affiliated Experts Submit Comments on the Joint FTC-DOJ Draft Merger Guidelines


Recent Advances in Economic Methodology for Coordinated Effects


U.S. and Plaintiff States v. American Airlines Group Inc. and JetBlue Airways Corp.


21st Annual International Industrial Organization Conference (IIOC)

Press Release

Cornerstone Research Affiliated Experts Named to Global Competition Review’s Inaugural List of Leading Antitrust Academics


Antitrust Expert Spotlight: Nathan Miller

Press Release

WWL: Global Leader Competition—Economists 2022

  • Institutional Shareholdings: Is There Really an Antitrust Issue?,” Global Antitrust Economics Conference, Concurrences Review and New York University Stern School of Business, 1 June 2018
  • “Regulating Privacy Online: An Economic Evaluation of the GDPR,” Fourteenth Annual Federal Trade Commission Microeconomics Conference, 4 November 2021
  • MergerFest 2020: Alternative Counterfactuals in Merger Enforcement, Cornerstone Research, 18 May 2020
  • “Oligopolistic Price Leadership and Mergers: The United States Beer Industry,” Twelfth Annual Federal Trade Commission Microeconomics Conference, 15 November 2019