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Social Interactions and Spillovers

  • Cabrales, Antonio
  • Calvó-Armengol, Antoni
  • Zenou, Yves

The aim of this paper is to provide a tractable model where both socialization (or network formation) and productive efforts can be analyzed simultaneously. This permits a full-fledged equilibrium/welfare analysis of network formation with endogenous productive efforts and heterogeneous agents. We show that there exist two stable interior equilibria, which we can Pareto rank. The socially efficient outcome lies between these two equilibria. When the intrinsic returns to production and socialization increase, all equilibrium actions decrease at the Pareto-superior equilibrium, while they increase at the Pareto-inferior equilibrium. In both cases, the percentage change in socialization effort is higher (in absolute value) than that of the productive effort.

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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 8127.

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Date of creation: Dec 2010
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Handle: RePEc:cpr:ceprdp:8127
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  1. 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.
  2. Gary S. Becker, 1974. "A Theory of Social Interactions," NBER Working Papers 0042, National Bureau of Economic Research, Inc.
  3. Luca P. Merlino & Andrea Galeotti, 2010. "Endogenous Job Contact Networks," 2010 Meeting Papers 853, Society for Economic Dynamics.
  4. Patacchini, Eleonora & Zenou, Yves, 2004. "Intergenerational Education Transmission: Neighborhood Quality and/or Parents' Involvement?," Working Paper Series 631, Research Institute of Industrial Economics.
  5. Steven N. Durlauf, 2002. "On the Empirics of Social Capital," Economic Journal, Royal Economic Society, vol. 112(483), pages 459-479, November.
  6. Bisin, A. & Verdier, T., 1999. "Beyond the Melting Pot : Cultural Transmission, Marriage, and the Evolution of Ethnic and Religious Traits," DELTA Working Papers 1999-10, DELTA (Ecole normale supérieure).
  7. Corchon, Luis C. & Mas-Colell, Andreu, 1996. "On the stability of best reply and gradient systems with applications to imperfectly competitive models," Economics Letters, Elsevier, vol. 51(1), pages 59-65, April.
  8. Antoni Calvó-Armengol & Rahmi Ilkiliç, 2005. "Pairwise-Stability and Nash Equilibria in Network Formation," Working Papers 2005.34, Fondazione Eni Enrico Mattei.
  9. Ioannides, Yannis M. & Soetevent, Adriaan R., 2007. "Social networking and individual outcomes beyond the mean field case," Journal of Economic Behavior & Organization, Elsevier, vol. 64(3-4), pages 369-390.
  10. Edward E. Glaeser & Bruce Sacerdote & Jose A. Scheinkman, 1995. "Crime and Social Interactions," Harvard Institute of Economic Research Working Papers 1738, Harvard - Institute of Economic Research.
  11. Francis Bloch & Bhaskar Dutta, 2008. "Communication networks with endogeneous link strength," Indian Statistical Institute, Planning Unit, New Delhi Discussion Papers 08-15, Indian Statistical Institute, New Delhi, India.
  12. 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.
  13. repec:cup:cbooks:9780521674096 is not listed on IDEAS
  14. Dee, Thomas S., 2004. "Are there civic returns to education?," Journal of Public Economics, Elsevier, vol. 88(9-10), pages 1697-1720, August.
  15. repec:cup:cbooks:9780521857406 is not listed on IDEAS
  16. Sanjeev Goyal, 2007. "Introduction to Connections: An Introduction to the Economics of Networks
    [Connections: An Introduction to the Economics of Networks]
    ," Introductory Chapters, Princeton University Press.
  17. Joel Sobel, 2002. "Can We Trust Social Capital?," Journal of Economic Literature, American Economic Association, vol. 40(1), pages 139-154, March.
  18. John F. Helliwell & Robert D. Putnam, 2007. "Education and Social Capital," Eastern Economic Journal, Eastern Economic Association, vol. 33(1), pages 1-19, Winter.
  19. Bramoulle, Yann & Kranton, Rachel, 2007. "Public goods in networks," Journal of Economic Theory, Elsevier, vol. 135(1), pages 478-494, July.
  20. Milligan, Kevin & Moretti, Enrico & Oreopoulos, Philip, 2004. "Does education improve citizenship? Evidence from the United States and the United Kingdom," Journal of Public Economics, Elsevier, vol. 88(9-10), pages 1667-1695, August.
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