Song Yao is the Assistant Professor of Marketing at the Kellogg School of Management, Northwestern University. Professor Yao's research interests include quantitative marketing, online marketing, auctions, competitive strategy, and customer management. With a methodological and theoretical orientation of empirical microeconomics, his substantive research focuses on network effects, especially in the context of new media such as online auctions and keyword search. His publications appear in leading academic journals, including Marketing Science. Prior to joining Kellogg, he taught Marketing Management at Duke University. He received his Ph.D. in Business Administration from Duke University, M.A. in Economics from the University of California, Los Angeles, and B.A. in Economics from Renmin University of China.