Proceedings of the 7th ACM conference on Electronic commerce

The papers in these proceedings represent the technical contributions to the 7th ACM Conference on Electronic Commerce -- EC'06, held June 11-15, 2006, at the University of Michigan in Ann Arbor, Michigan, USA. Since its inception in 1999, ACM EC has served as the leading scientific conference on advances in theory, systems, and applications for electronic commerce. The natural focus of the conference is on computer science issues, but the conference is interdisciplinary in nature, addressing a number of facets of electronic commerce including (1) theory and foundations; (2) languages; (3) automation, personalization, and targeting; (4) security, privacy, encryption, and digital rights; (5) applications and empirical studies; and (6) social factors. In addition to the main technical program, EC'06 featured four workshops, four tutorials, and invited keynote presentations from UC Berkeley School of Information Professor Hal Varian and Harvard Economics Professor Drew Fudenberg.The call for papers attracted 127 submissions from authors in academia and industry from around the world, including Africa, Asia, Canada, Europe, the Middle East, and the United States. Each paper was reviewed by at least three program committee members on the basis of scientific novelty, technical quality, and importance to the field. After discussion and deliberation among the program committee and program chairs, 36 papers were selected for publication in these proceedings and for presentation at the conference.