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Strategic Information Transmission in Networks

  • Andrea Galeotti

    ()

  • Christian Ghiglino

    ()

  • Francesco Squintani

    ()

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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File URL: http://www.essex.ac.uk/economics/discussion-papers/papers-text/dp668.pdf
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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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  1. Marco Battaglini, 2002. "Multiple Referrals and Multidimensional Cheap Talk," Econometrica, Econometric Society, vol. 70(4), pages 1379-1401, July.
  2. Andrea Galeotti & Sanjeev Goyal, 2010. "The Law of the Few," American Economic Review, American Economic Association, vol. 100(4), pages 1468-92, September.
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  4. Austen-Smith David, 1993. "Interested Experts and Policy Advice: Multiple Referrals under Open Rule," Games and Economic Behavior, Elsevier, vol. 5(1), pages 3-43, January.
  5. Jeanne Hagenbach & Frédéric Koessler, 2009. "Strategic communication networks," Documents de travail du Centre d'Economie de la Sorbonne 09005, Université Panthéon-Sorbonne (Paris 1), Centre d'Economie de la Sorbonne.
  6. Jackson, Matthew O. & Wolinsky, Asher, 1996. "A Strategic Model of Social and Economic Networks," Journal of Economic Theory, Elsevier, vol. 71(1), pages 44-74, October.
  7. Bloch, Francis & Dutta, Bhaskar, 2009. "Communication networks with endogenous link strength," Games and Economic Behavior, Elsevier, vol. 66(1), pages 39-56, May.
  8. Fiorina, Morris P, 1987. "Comment: Alternative Rationales for Restrictive Procedures [Collective Decisionmaking and Standing Committees: An Informational Rationale for Restrictive Amendment Procedures]," Journal of Law, Economics and Organization, Oxford University Press, vol. 3(2), pages 337-43, Fall.
  9. Galeotti, Andrea & Goyal, Sanjeev & Kamphorst, Jurjen, 2006. "Network formation with heterogeneous players," Games and Economic Behavior, Elsevier, vol. 54(2), pages 353-372, February.
  10. Ricardo Alonso & Wouter Dessein & Niko Matouschek, 2008. "When Does Coordination Require Centralization?," American Economic Review, American Economic Association, vol. 98(1), pages 145-79, March.
  11. Radner, Roy, 1993. "The Organization of Decentralized Information Processing," Econometrica, Econometric Society, vol. 61(5), pages 1109-46, September.
  12. Wouter Dessein, 2000. "Authority and Communication in Organizations," Econometric Society World Congress 2000 Contributed Papers 1747, Econometric Society.
  13. Ricardo Alonso & Wouter Dessein & Niko Matouschek, 2008. "When Does Coordination Require Centralization? Corrigendum," American Economic Review, American Economic Association, vol. 98(3), pages 1195-96, June.
  14. Mathias Dewatripont & Patrick Bolton, 1996. "The firm as a communication network," ULB Institutional Repository 2013/9597, ULB -- Universite Libre de Bruxelles.
  15. Ambrus, Attila & Takahashi, Satoru, 2008. "Multi-sender cheap talk with restricted state spaces," Theoretical Economics, Econometric Society, vol. 3(1), March.
  16. Hart, Oliver D. & Moore, John, 2005. "On the Design of Hierarchies: Coordination Versus Specialization," Scholarly Articles 3448676, Harvard University Department of Economics.
  17. Sanjeev Goyal, 2007. "Introduction to Connections: An Introduction to the Economics of Networks
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    ," Introductory Chapters, Princeton University Press.
  18. repec:hal:journl:halshs-00367692 is not listed on IDEAS
  19. Asher Wolinsky, 1999. "Eliciting Information From Multiple Experts," Discussion Papers 1277, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  20. Goltsman, Maria & Pavlov, Gregory, 2011. "How to talk to multiple audiences," Games and Economic Behavior, Elsevier, vol. 72(1), pages 100-122, May.
  21. Vijay Krishna & John Morgan, 2001. "A Model Of Expertise," The Quarterly Journal of Economics, MIT Press, vol. 116(2), pages 747-775, May.
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  23. Sergio Currarini & Paolo Pin & Matthew O. Jackson, 2007. "An Economic Model of Friendship: Homophily, Minorities and Segregation," Working Papers 2007_20, Department of Economics, University of Venice "Ca' Foscari".
  24. Sah, Raaj Kumar & Stiglitz, Joseph E, 1986. "The Architecture of Economic Systems: Hierarchies and Polyarchies," American Economic Review, American Economic Association, vol. 76(4), pages 716-27, September.
  25. Farrell, J. & Gibbons, R., 1989. "Cheap Talk With Two Audiences," Working papers 518, Massachusetts Institute of Technology (MIT), Department of Economics.
  26. Ottaviani, Marco & Sorensen, Peter, 2001. "Information aggregation in debate: who should speak first?," Journal of Public Economics, Elsevier, vol. 81(3), pages 393-421, September.
  27. repec:pse:psecon:2008-10 is not listed on IDEAS
  28. Heikki Rantakari, 2008. "Governing Adaptation -super-1," Review of Economic Studies, Oxford University Press, vol. 75(4), pages 1257-1285.
  29. Gilligan, Thomas W & Krehbiel, Keith, 1987. "Collective Decisionmaking and Standing Committees: An Informational Rationale for Restrictive Amendment Procedures," Journal of Law, Economics and Organization, Oxford University Press, vol. 3(2), pages 287-335, Fall.
  30. Frédéric Koessler & David Martimort, 2008. "Multidimensional communication mechanisms: cooperative and conflicting designs," PSE Working Papers halshs-00586854, HAL.
  31. Andrea Galeotti, 2006. "One-way flow networks: the role of heterogeneity," Economic Theory, Springer, vol. 29(1), pages 163-179, September.
  32. repec:hal:wpaper:halshs-00586854 is not listed on IDEAS
  33. Battaglini Marco, 2004. "Policy Advice with Imperfectly Informed Experts," The B.E. Journal of Theoretical Economics, De Gruyter, vol. 4(1), pages 1-34, April.
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