Sébastien Lahaie is a research scientist in the Market Algorithms group at Google Research, NYC. He received his PhD in Computer Science from Harvard in 2007 and was previously a researcher at Yahoo and Microsoft Research. His research focuses on computational aspects of market design, with applications to sponsored search and display advertising. He is interested in designing market algorithms that scale well and properly anticipate user behavior. Other interests include preference modeling and elicitation, combinatorial auctions, and prediction markets.