{"type":"ScholarlyArticle","title":"Bounding the Inefficiency of Compromise","authors":[{"name":"Ioannis Caragiannis","slug":"ioannis-caragiannis","given":"Ioannis","family":"Caragiannis","affiliation":"University of Patras"},{"name":"Panagiotis Kanellopoulos","slug":"panagiotis-kanellopoulos","given":"Panagiotis","family":"Kanellopoulos","affiliation":"CTI & University of Patras"},{"name":"Alexandros A. Voudouris","slug":"alexandros-a-voudouris","given":"Alexandros A.","family":"Voudouris","affiliation":"University of Patras"}],"abstract":"Social networks on the Internet have seen an enormous growth recently and play a crucial role in different aspects of today's life. They have facilitated information dissemination in ways that have been beneficial for their users but it is also a common belief that they are often used strategically in order to spread information that only serves the objectives of particular users. These properties have inspired a revision of classical opinion formation models from sociology using game-theoretic notions and tools. We follow the same modeling approach, focusing on scenarios where the opinion expressed by each user is a compromise between her internal belief and the opinions of a small number of neighbors among her social acquaintances. We formulate simple games that capture this behavior and quantify the inefficiency of equilibria using the well-known notion of the price of anarchy. Our results indicate that compromise comes at a cost that strongly depends on the neighborhood size.","doi":"10.24963/ijcai.2017/21","url":"https://ijcai.org/proceedings/2017/21","pdf":"https://ijcai.org/proceedings/2017/0021.pdf","markdown":"https://ijcai.org/proceedings/2017/21.md","bibtex":"https://ijcai.org/proceedings/2017/bibtex/21","volume":{"slug":"2017","title":"Proceedings of the Twenty-Sixth International Joint Conference on Artificial Intelligence","short_title":"IJCAI 2017","url":"https://ijcai.org/proceedings/2017/","year":2017,"location":"Melbourne, Australia","dates":"19-25 August 2017","editors":"Carles Sierra","isbn":"978-0-9992411-0-3","publisher":"International Joint Conferences on Artificial Intelligence Organization","doi_prefix":"10.24963/ijcai.2017"},"section":"Agent-based and Multi-agent Systems","track":"Main track","number":21,"pages":{"first":142,"last":148},"keywords":["Agent-based and Multi-agent Systems: Economic paradigms, auctions and market-based systems","Agent-based and Multi-agent Systems: Noncooperative Games"],"videos":[],"references":[{"position":1,"raw":"[Anshelevich et al., 2008] Elliot Anshelevich, Anirban Das- gupta, Jon M. 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