Alice M. Tybout is the Harold T. Martin Professor of Marketing and a former chairperson of the Marketing Department at the Kellogg School of Management, Northwestern University. She is academic director of the consumer marketing strategy program and the branding program at Kellogg's Allen Center, the author of more than forty articles and book chapters, a consultant for leading companies, including Abbott Laboratories, Coca-Cola Company, and Pfizer, and a member of the board of directors of RHR International.Bobby J. Calder is the Charles H. Kellstadt Professor of Marketing and the current chairperson of the Department of Marketing at the Kellogg School of Management, Northwestern… University. Previously, he has taught at the Wharton School, University of Pennsylvania, and has been a consultant for Booz Allen Hamilton. He is the author of numerous research studies and articles. He has been a consultant to companies such as Aetna, Bristol-Myers Squibb, Cemex, Coca-Cola, General Electric, General Motors, McDonald's, Motorola, Prudential, Tribune Co., and Time Warner.