Information Sharing Networks in Linear Quadratic Games
AbstractWe study the bilateral exchange of information in the context of linear quadratic games. An information structure is here represented by a non directed network, whose nodes are agents and whose links represent sharing agreements. We first study the equilibrium use of information in any given sharing network, finding that the extent to which a piece of information is "public" affects the equilibrium use of it, in line with previous results in the literature. We then study the incentives to share information ex-ante, highlighting the role of the elasticity of payoffs to the equilibrium volatility of one's own strategy and of one's opponents' strategies. For the case of uncorrelated signals we fully characterize pairwise stable networks for the general linear quadratic game. For the case of correlated signals, we study pair-wise stable networks for three specific linear quadratic games - Cournot oligopoly, Keynes’ beauty contest and Public good provision - in which strategies are substitute, complement and orthogonal, respectively. We show that signals’ correlation favors the transmission of information, but may also prevent all information from being transmitted.
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Bibliographic InfoPaper provided by Fondazione Eni Enrico Mattei in its series Working Papers with number 2013.47.
Date of creation: May 2013
Date of revision:
Information Sharing; Networks; Bayesian Equilibrium; Beauty Contest; Oligopoly;
Find related papers by JEL classification:
- D43 - Microeconomics - - Market Structure and Pricing - - - Oligopoly and Other Forms of Market Imperfection
- D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
- D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation
- L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
This paper has been announced in the following NEP Reports:
- NEP-ALL-2013-06-16 (All new papers)
- NEP-CTA-2013-06-16 (Contract Theory & Applications)
- NEP-GTH-2013-06-16 (Game Theory)
- NEP-MIC-2013-06-16 (Microeconomics)
- NEP-NET-2013-06-16 (Network Economics)
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Stephen Morris & Hyun Song Shin, 2002. "Social Value of Public Information," American Economic Review, American Economic Association, vol. 92(5), pages 1521-1534, December.
- Coralio Ballester & Antoni Calvo-Armengol & Yves Zenou, 2005.
"Who's Who in Networks. Wanted: the Key Player,"
NajEcon Working Paper Reviews
- Coralio Ballester & Antoni Calvó-Armengol & Yves Zenou, 2004. "Who's Who in Networks. Wanted: The Key Player," Working Papers 178, Barcelona Graduate School of Economics.
- Ballester, Coralio & Calvó-Armengol, Antoni & Zenou, Yves, 2005. "Who’s Who in Networks. Wanted: The Key Player," CEPR Discussion Papers 5329, C.E.P.R. Discussion Papers.
- Matthew O. Jackson & Asher Wolinsky, 1994.
"A Strategic Model of Social and Economic Networks,"
1098, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Novshek, William & Thoman, Lynda, 1998. "Information disaggregation and incentives for non-collusive information sharing," Economics Letters, Elsevier, vol. 61(3), pages 327-332, December.
- Dasgupta, Sudipto & Shin, Jhinyoung, 1999. "Information sharing, information free-riding and capital structure in oligopolies," International Journal of Industrial Organization, Elsevier, vol. 17(1), pages 109-135, January.
- 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.
- Jeanne Hagenbach & Frédéric Koessler, 2008. "Strategic communication networks," PSE Working Papers halshs-00586847, HAL.
- Jeanne Hagenbach & Frédéric Koessler, 2009. "Strategic Communication Networks," UniversitÃ© Paris1 PanthÃ©on-Sorbonne (Post-Print and Working Papers) halshs-00367692, HAL.
- Gal-Or, Esther, 1985. "Information Sharing in Oligopoly," Econometrica, Econometric Society, vol. 53(2), pages 329-43, March.
- Gal-Or, Esther, 1986. "Information Transmission-Cournot and Bertrand Equilibria," Review of Economic Studies, Wiley Blackwell, vol. 53(1), pages 85-92, January.
- Raith, Michael, 1996. "A General Model of Information Sharing in Oligopoly," Journal of Economic Theory, Elsevier, vol. 71(1), pages 260-288, October.
- David Malueg & Shunichi Tsutsui, 1996. "Coalition-proof information exchanges," Journal of Economics, Springer, vol. 63(3), pages 259-278, October.
- Andrea Galeotti & Christian Ghiglino & Francesco Squintani, 2009. "Strategic Information Transmission in Networks," Economics Discussion Papers 668, University of Essex, Department of Economics.
- Sergio Currarini & Marco A. Marini, 2013.
"Coalitional Approaches to Collusive Agreements in Oligopoly Games,"
DIAG Technical Reports
2013-15, Department of Computer, Control and Management Engineering, Universita' degli Studi di Roma "La Sapienza".
- Sergio Currarini & Marco Marini, 2011. "Coalitional Approaches to Collusive Agreements in Oligopoly Games," Working Papers 1113, University of Urbino Carlo Bo, Department of Economics, Society & Politics - Scientific Committee - L. Stefanini & G. Travaglini, revised 2011.
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