News Posting by Strategic Users in a Social Network

  • Authors:
  • Mangesh Gupte;Mohammadtaghi Hajiaghayi;Lu Han;Liviu Iftode;Pravin Shankar;Raluca M. Ursu

  • Affiliations:
  • Department of Computer Science, Rutgers University, Piscataway 08854;AT&T Labs --- Research, Florham Park 07932;Department of Computer Science, Rutgers University, Piscataway 08854;Department of Computer Science, Rutgers University, Piscataway 08854;Department of Computer Science, Rutgers University, Piscataway 08854;Mount Holyoke College, South Hadley 01075

  • Venue:
  • WINE '09 Proceedings of the 5th International Workshop on Internet and Network Economics
  • Year:
  • 2009

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Abstract

We argue that users in social networks are strategic in how they post and propagate information. We propose two models -- greedy and courteous -- and study information propagation both analytically and through simulations. For a suitable random graph model of a social network, we prove that news propagation follows a threshold phenomenon, hence, "high-quality" information provably spreads throughout the network assuming users are "greedy". Starting from a sample of the Twitter graph, we show through simulations that the threshold phenomenon is exhibited by both the greedy and courteous user models.