This research symposium, hosted by the by the Searle Center on Law, Regulation, and Economic Growth at the Northwestern University School of Law in Chicago, IL on 10-11 June 2010, provided a forum where economists and legal scholars convened with Northwestern faculty to present and discuss high quality research relevant to the economics and law of Internet search. The conference covered academic work on Internet search and the discussion examined public policy issues in antitrust, regulation, and intellectual property. On the first day of the symposium, NERA Special Consultant Dr. Henry Butler, the Executive Director of the Searle Center, gave the welcome and introduction, and moderated a session entitled "Market Structure and the Internet." As part of this session, Special Consultant Dr. Michael Baye, the Bert Elwert Professor of Business at Indiana University's Kelley School of Business, gave a presentation entitled "Horizontal Mergers Involving Online Firms: Structural Estimation and Competitive Effects."