Gregory S CarpenterGregory S. Carpenter is the James Farley/Booz Allen Hamilton Professor of Marketing Strategy and director of the Center for Market Leadership at the Kellogg School of Management of Northwestern University, and he hosts the annual Kellogg Marketing Ledership Summit. He is the co-author of Resurgence: The Four Stages of Market-Focused Reinvention. He is also a frequent speaker on marketing strategy, and his research has been featured in Harvard Business Review, Financial Times, and NPR. Read More Read Less