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Strategic Information Transmission in Networks

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Author Info

  • Andrea Galeotti

    ()

  • Christian Ghiglino

    ()

  • Francesco Squintani

    ()

Abstract

We introduce a tractable model of cheap talk among players located on networks. In our model, a player can send a message to another player if and only if he is linked to him. We derive a sharp equilibrium and welfare characterization which reveals two basic insights. In equilibrium, the willingness of a player to communicate with a neighbor decreases with the number of opponents who communicate with the neighbor. The ex-ante equilibrium welfare of every player increases not only with the number of truthful reports transmitted in the network, but also when truthful reports are more evenly distributed across players. We apply our findings to the analysis of homophily in communities, to organization design, and to the study of endogenous network formation. Communication across communities decreases as communities become larger, and communication may be asymmetric: From large communities to small ones. In our set up, fully decentralized organizations maximize all players� welfare. Further, decentralized networks, where information may flow asymmetrically, endogenously form in equilibrium. Finally, we introduce the possibility of public communication in networks, and identify conditions under which public communication Pareto dominates private communication.

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Bibliographic Info

Paper provided by University of Essex, Department of Economics in its series Economics Discussion Papers with number 668.

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Date of creation: 28 May 2009
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Handle: RePEc:esx:essedp:668

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References

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Citations

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Cited by:
  1. Holzner, Christian & Gautier, Pieter, 2013. "Simultaneous search and network efficiency," Annual Conference 2013 (Duesseldorf): Competition Policy and Regulation in a Global Economic Order 79740, Verein für Socialpolitik / German Economic Association.
  2. Jeanne Hagenbach & Frédéric Koessler & Eduardo Perez-Richet, 2012. "Certifiable Pre-Play Communication: Full Disclosure," PSE Working Papers hal-00753473, HAL.
  3. Daron Acemoglu & Asuman Ozdaglar, 2011. "Opinion Dynamics and Learning in Social Networks," Dynamic Games and Applications, Springer, vol. 1(1), pages 3-49, March.
  4. Maria Goltsman & Gregory Pavlov, 2008. "How to Talk to Multiple Audiences," UWO Department of Economics Working Papers 20081, University of Western Ontario, Department of Economics.
  5. Sergio Currarini & Francesco Feri, 2013. "Information Sharing Networks in Linear Quadratic Games," Working Papers 2013.47, Fondazione Eni Enrico Mattei.
  6. Bimpikis, Kostas & Ozdaglar, Asuman & Acemoglu, Daron, 2014. "Dynamics of information exchange in endogenous social networks," Theoretical Economics, Econometric Society, vol. 9(1), January.
  7. Jeanne Hagenbach & Frédéric Koessler, 2011. "Full Disclosure in Decentralized Organizations," Working Papers halshs-00652279, HAL.
  8. Jeanne Hagenbach & Frédéric Koessler, 2011. "Full Disclosure in Decentralized Organizations," PSE Working Papers halshs-00652279, HAL.
  9. Ambrus, Attila & Azevedo, Eduardo M. & Kamada, Yuichiro, 2013. "Hierarchical cheap talk," Theoretical Economics, Econometric Society, vol. 8(1), January.
  10. Pier-Andre Bouchard St-Amant, 2013. "Externalities, Social Value and Word of Mouth: Notions of Public Economics on Networks," Working Papers 1301, Queen's University, Department of Economics.
  11. Acemoglu, Daron & Ozdaglar, Asuman & ParandehGheibi, Ali, 2010. "Spread of (mis)information in social networks," Games and Economic Behavior, Elsevier, vol. 70(2), pages 194-227, November.
  12. Wang, Yun, 2013. "The result of world powers in WTO: A cheap-talk game under different communication protocols," China Economic Review, Elsevier, vol. 27(C), pages 192-207.
  13. Simon Burgess & Eleanor Sanderson & Marcela Umana-Aponte, 2011. "School ties: An analysis of homophily in an adolescent friendship network," The Centre for Market and Public Organisation 11/267, Department of Economics, University of Bristol, UK.
  14. Junichiro Ishida, & Takashi Shimizu, 2012. "Can More Information Facilitate Communication?," ISER Discussion Paper 0839, Institute of Social and Economic Research, Osaka University.
  15. Junichiro Ishida & Takashi Shimizu, 2012. "Asking One Too Many? Why Leaders Need to Be Decisive," ISER Discussion Paper 0857, Institute of Social and Economic Research, Osaka University.

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