Self-organizing Flows in Social Networks

Abstract : Social networks offer users new means of accessing information, essentially relying on ''social filtering'', i.e. propagation and filtering of information by social contacts. The sheer amount of data flowing in these networks, combined with the limited budget of attention of each user, makes it difficult to ensure that social filtering brings relevant content to the interested users. Our motivation in this paper is to measure to what extent self-organization of the social network results in efficient social filtering. To this end we introduce flow games, a simple abstraction that models network formation under selfish user dynamics, featuring user-specific interests and budget of attention. In the context of homogeneous user interests, we show that selfish dynamics converge to a stable network structure (namely a pure Nash equilibrium) with close-to-optimal information dissemination. We show in contrast, for the more realistic case of heterogeneous interests, that convergence, if it occurs, may lead to information dissemination that can be arbitrarily inefficient, as captured by an unbounded ''price of anarchy''. Nevertheless the situation differs when users' interests exhibit a particular structure, captured by a metric space with low doubling dimension. In that case, natural autonomous dynamics converge to a stable configuration. Moreover, users obtain all the information of interest to them in the corresponding dissemination, provided their budget of attention is logarithmic in the size of their interest set., x-id-hal = hal-00761046
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Conference papers
Structural Information AND Communication Complexity - 20th International Colloquium, SIROCCO, Jul 2013, Ischia, Italy. Springer, 8179, pp.116-128, 2013
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Contributor : Laurent Viennot <>
Submitted on : Tuesday, November 26, 2013 - 5:07:04 PM
Last modification on : Friday, August 31, 2018 - 9:12:06 AM

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Nidhi Hegde, Laurent Massoulié, Laurent Viennot. Self-organizing Flows in Social Networks. Structural Information AND Communication Complexity - 20th International Colloquium, SIROCCO, Jul 2013, Ischia, Italy. Springer, 8179, pp.116-128, 2013. 〈hal-00909718〉

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