Nathan Miller

McDonough School of Business and Department of Economics,
Georgetown University

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  • Kıvanç A. Kırgız
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Nathan Miller is an antitrust expert who consults on high-stakes merger and other enforcement investigations. His research covers industrial organization, finance, and regulation, with a focus on merger investigations, cartels, tacit coordination, and price discrimination.

On behalf of merging parties, Professor Miller has addressed competitive effects, including upstream and downstream aspects, in a variety of complex matters, including 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 Department of Justice (DOJ) in U.S. and Plaintiff States v. American Airlines Group Inc. and JetBlue Airways Corp. The opinion in that matter frequently echoed Professor Miller’s testimony; a judge sided with the DOJ and ruled that American Airlines and JetBlue must undo their Northeast Alliance.

The Federal Trade Commission (FTC) retained Professor Miller in its investigation into Tronox Holdings plc.’s proposed $300 million acquisition of TiZir Titanium and Iron. Also on behalf of the FTC, Professor Miller analyzed US Foods Inc.’s proposed $1.8 billion acquisition of Services Group of America Inc. and Edgewell Personal Care Company’s proposed $1.37 billion acquisition of its competitor, Harry’s Inc.

The Canadian Competition Bureau retained Professor Miller in Secure Energy Services Inc./Tervita Corporation, a transaction between Canada’s two largest waste service providers. In its ruling, the Competition Tribunal found Dr. Miller “knowledgeable, helpful, candid, and forthcoming with the panel” and “genuinely interested in assisting the Tribunal to make the right determinations.”

As a former staff economist for the Antitrust Division of the DOJ, 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.

At Georgetown, Professor Miller teaches courses to graduate students on strategic pricing, microeconomics, and firm analysis and strategy. Earlier in his career at the university, he was recognized as 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.

Who’s Who Legal has recognized Professor Miller as a “definite future leader” in the competition field. Global Competition Review named him to its inaugural list of the world’s most important antitrust academics.


In the Matter of Securus Technologies Inc. and Inmate Calling Solutions LLC

Press Release

Nathan Miller Receives 2023 Antitrust Enforcement Award


Secure Energy Services Inc./Tervita Corporation

Press Release

WWL: Competition Global Leaders and Consulting Experts 2023


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.

  • 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