His research covers topics in the fields of industrial organization and finance, including price discrimination, cartel enforcement, cost pass-through, tacit coordination, and incomplete contracts. He has published articles in the American Economic Review, the RAND Journal of Economics, the Journal of Finance, and the Journal of Financial Economics, among other journals. His teaching portfolio at McDonough includes the core MBA course in microeconomics and strategy, and an elective MBA course on pricing. Prior to joining Georgetown University, Professor Miller served as an economist at the U.S. Department of Justice Antitrust Division, where he provided economic analysis for numerous antitrust investigations, most notably the merger investigations of AT&T/T-Mobile, Bazaarvoice/Power Reviews, and Ticketmaster/Live Nation.