Eric Posner

Eric Andrew Posner (; born December 5, 1965) is an American lawyer and legal scholar who has served as a counsel for the Department of Justice Antitrust Division since 2022. As a law professor at the University of Chicago Law School, Posner has taught international law, contract law, and bankruptcy, among other areas. He is the son of retired Seventh Circuit Judge Richard Posner. Education Posner attended Yale University, earning B.A. and M.A. degrees in philosophy, summa cum laude. and received his J.D. degree, magna cum laude, from Harvard Law School in 1991. He clerked for Judge Stephen F. Williams of the D.C. Circuit. Career Posner started his teaching career at the University of Pennsylvania Law School from 1993 to 1998. In 1998, Posner joined the University of Chicago Law School where he is now the Kirkland and Ellis Distinguished Service Professor of Law and Esther Kane Research Chair. He has also been a visiting professor at Columbia Law School and NYU School of Law. From 1998 to 2011, he was an editor of The Journal of Legal Studies. He is the author or co-author of many books and articles, on subjects including international law, cost-benefit analysis, and constitutional law. At Chicago he teaches Antitrust, Contracts, Public International Law, and Financial Regulation, amongst other courses. Beginning in 2022, Posner began service as Counsel to the Assistant Attorney General for Antitrust at the United States Department of Justice. Work