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Eric A. Posner

Eric Posner is a renowned legal scholar whose research interests include financial regulation, antitrust law, and contract law. He is the Kirkland & Ellis Distinguished Service Professor of Law at the University of Chicago Law School and the Arthur and Esther Kane Research Chair. He served as Counsel to the Assistant Attorney General for the Antitrust Division of the Justice Department from 2022 to 2023.

Mr. Posner is a prolific writer and has authored more than a dozen books and a hundred articles. His most recent books include Radical Markets (Princeton University Press, 2018) (with Glen Weyl), which was named a book of the year by The Economist in 2018, and Last Resort: The Financial Crisis and the Future of Bailouts (University of Chicago Press, 2018), which was named a book of the year by the Financial Times in 2018. He has testified before Congress and government agencies, including the Federal Trade Commission. He has written op-eds and essays for The New York Times, The Wall Street Journal, and other media.

In addition, Mr. Posner is fellow of the American Academy of Arts and Sciences and a member of the American Law Institute. He was named to the Lawdragon 500 Leading Lawyers in America in 2019 and 2020, and to the Bloomberg 50 in 2018.

Prior to joining the University of Chicago, Mr. Posner taught at the University of Pennsylvania Law School and prior to that worked as Attorney Adviser in the Office of Legal Counsel at the U.S. Department of Justice. Mr. Posner served as a law clerk to the Honorable Stephen F. Williams of the United States Court of Appeals for the D.C. Circuit.

Representative Matters

  • A monoline insurer in contract and tort case against bond trustee
  • Defended Medicare Advantage provider network against competitor’s application for injunction prohibiting market entry
  • A putative class of medical products purchasers in antitrust suit against medical device manufacturer and distributors
  • Leading Antitrust Scholars as Amici Curiae in Apple v. Pepper before U.S. Supreme Court


  • Law clerk to the Honorable Stephen F. Williams, United States Court of Appeals for the D.C. Circuit


Harvard Law School, J.D., magna cum laude

Yale University, B.A., M.A., summa cum laude

Bar and Court Admissions

  • Maryland
  • Illinois
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