Rakesh V. Vohra is the John L. and Helen Kellogg Professor of Managerial Economics and Decision Sciences at the Kellogg School of Management, Northwestern University, where he is also Director of the Center for Mathematical Studies in Economics and Management Science. He previously taught at the Fisher School of Business, Ohio State University, MIT's Sloan School of Management, the Wharton School, University of Pennsylvania and is the author of Advanced Mathematical Economics (2005) and Mechanism Design: A Linear Programming Approach (Econometric Society Monographs, Cambridge University Press, 2011). Professor Vohra received his doctorate in mathematics from the University of Maryland. Lakshman Krishnamurthi is the Montgomery Ward Distinguished Professor of Marketing at the Kellogg School of Management, Northwestern University, where he has taught since 1980. He chaired the marketing department from 1993 to 2004 and has served as Academic Director of the Pricing Strategies and Tactics program since 1995. Professor Krishnamurthi is the recipient of the Paul Green and Donald Lehmann awards from the Journal of Marketing Research, the John D. C. Little award from Marketing Science and numerous teaching awards at Kellogg. He earned his doctorate in marketing from Stanford University.