George S. Day is the Geoffrey T. Boisi Professor and co-director of the Mack Center for Technological Innovation at The Wharton School, University of Pennsylvania. Previously he was chairman of the board for the American Marketing Association, and has served as a consultant to GE, IBM, Medtronic, Merck, W.L. Gore and Associates, and other corporations. His books include Strategy from the Outside In and Peripheral Vision, among others. Day lives in Villanova, Pennsylvania.