Leon Schiffman is a professor of marketing and holds the J. Donald Kennedy Endowed Chair in e–commerce at St John's University in New York. He is a nationally recognised scholar in the field of consumer behaviour. He is an experienced research consultant and has conducted research projects of leading American and multinational firms, including AT&T, Citibank, The Hertz Corporation, Lever Brothers, Major League Baseball, Marriott Corporation, Merrill Lynch, Mobil Oil and Patek Philippe.