David is the Xinmei Zhang and Yongge Dai Professor, and Professor of Marketing at the Wharton School, University of Pennsylvania.

He is an expert in consumer shopping behavior and Internet retailing and he advises and invests in prominent internet retail startups. His forthcoming book Location is (Still) Everything: The Surprising Effect of the Real World on How We Shop, Search, and Sell in the Virtual One explains why physical geography shapes what happens online. He has published articles in all major marketing journals including Journal of Consumer Research, Journal of Marketing, Journal of Marketing Research, Marketing Science, and Management Science. His research has been recognized with the Frank M. Bass Outstanding Dissertation Award, three John D.C. Little Best Paper Finalist Awards, and two INFORMS Marketing Science Long Term Impact Finalist Awards. He holds a Ph.D. from the Graduate School of Business at Stanford University, an MS in Statistics from Stanford University, an M.Com (1st Class Honors) and B.Com from the University of Auckland, New Zealand.