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Network formation with decreasing marginal benefits of information

In the two-way flow connections model of the seminal paper by Bala and Goyal (2000a), the marginal benefit of obtaining the information of one more player is constant. However, it is plausible that the marginal benefit of such information is decreasing. This paper explores the consequences for the stability of networks of such decreasing marginal benefits. We start by characterizing the strict Nash networks for both the case of constant and the case of decreasing marginal benefits. Using this characterization, we next explore how the set of strict Nash networks differs for the two cases. The results and intuition tells us that long diameter networks have certain features which make them relatively more likely to be stable under decreasing marginal benefits of information as compared to short diameter networks.

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File URL: http://dspace.library.uu.nl/bitstream/handle/1874/309743/08_16.pdf
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Paper provided by Utrecht School of Economics in its series Working Papers with number 08-16.

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Date of creation: Jul 2008
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Handle: RePEc:use:tkiwps:0816
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  1. Filippo VERGARA CAFFARELLI, 2004. "Non-Cooperative Network Formation with Network Maintenance Costs," Economics Working Papers ECO2004/18, European University Institute.
  2. Jurjen Kamphorst & Gerard Van Der Laan, 2007. "Network Formation Under Heterogeneous Costs: The Multiple Group Model," International Game Theory Review (IGTR), World Scientific Publishing Co. Pte. Ltd., vol. 9(04), pages 599-635.
  3. Andrea Galeotti & Sanjeev Goyal & Jurjen Kamphorst, 2003. "Network Formation with Heterogeneous Players," Economics Discussion Papers 562, University of Essex, Department of Economics.
  4. Berno Buechel, 2007. "Network formation with closeness incentives," Center for Mathematical Economics Working Papers 395, Center for Mathematical Economics, Bielefeld University.
  5. Goyal, Sanjeev & Vega-Redondo, Fernando, 2007. "Structural holes in social networks," Journal of Economic Theory, Elsevier, vol. 137(1), pages 460-492, November.
  6. Haller, Hans & Sarangi, Sudipta, 2005. "Nash networks with heterogeneous links," Mathematical Social Sciences, Elsevier, vol. 50(2), pages 181-201, September.
  7. Sanjeev Goyal & Sumit Joshi, 2006. "Unequal connections," International Journal of Game Theory, Springer, vol. 34(3), pages 319-349, October.
  8. Hojman, Daniel A. & Szeidl, Adam, 2008. "Core and periphery in networks," Journal of Economic Theory, Elsevier, vol. 139(1), pages 295-309, March.
  9. Venkatesh Bala & Sanjeev Goyal, 2000. "A Noncooperative Model of Network Formation," Econometrica, Econometric Society, vol. 68(5), pages 1181-1230, September.
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