Publications [#325220] of Vincent Conitzer

Conference articles PUBLISHED

1. Brill, M; Conitzer, V; Freeman, R; Shah, N, False-name-proof recommendations in social networks, Proceedings of the International Joint Conference on Autonomous Agents and Multiagent Systems, AAMAS (January, 2016), pp. 332-340, ISBN 9781450342391
   (last updated on 2024/04/23)

   Abstract:
   We study the problem of finding a recommendation for an uninformed user in a social network by weighting and aggregating the opinions offered by the informed users in the network. In social networks, an informed user may try to manipulate the recommendation by performing a false-name manipulation, wherein the user submits multiple opinions through fake accounts. To that end, we impose a no harm axiom: false-name manipulations by a user should not reduce the weight of other users in the network. We show that this axiom has deep connections to false-name-proofness. While it is impossible to design a mechanism that is best for every network subject to this axiom, we propose an intuitive mechanism LEGIT+, and show that it is uniquely optimized for small networks. Using real-world datasets, we show that our mechanism performs very well compared to two baseline mechanisms in a number of metrics, even on large networks.