DAVID BESANKO is the Alvin J. Huss Distinguished Professor of Management and Strategy at the Kellogg School of Management at Northwestern University. He received his AB in Political Science from Ohio University in 1977, his MS in Managerial Economics and Decision Sciences from Northwestern University in 1982. Before joining the Kellogg faculty in 1991, Professor Besanko was a member of the faculty of the School of Business at Indiana University from 1982 to 1991. In addition, in 1985, he held a post-doctorate position on the Economics Staff at Bell Communications Research. Professor Besanko teaches courses in the fields of Management and Strategy, Competitive Strategy, and Managerial Economics. In 1995, the graduating class at Kellogg awarded Professor Besanko the L.G. Lavengood Professor of the Year, the highest teaching honor a faculty member at Kellogg can receive.RONALD R. BRAEUTIGAM is the Harvey Kapnick Professor of Business Institutions in the Department of Economics at Northwestern University. He is Associate Dean for Undergraduate Studies in the Weinberg College of Arts and Sciences. He received a BS in Petroleum Engineering from the University of Tulsa in 1970 and then attended Stanford University and the California Institute of Technology, and he has also held an appointment as a Senior Research Fellow at the Wissenschaftszentrum Berlin (Science Center Berlin). He has also worked in both government and industry, beginning his career as a petroleum engineer with Standard Oil of Indiana (now BP), serving as research economist in The White House office of Telecommunications Policy, and as an economic consultant to Congress, many government agencies and private firms on matters of pricing, costing, managerial strategy, antitrust, and regulation.Besanko, David is the author of 'Microeconomics', published 2004 under ISBN 9780471457695 and ISBN 0471457698.