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Endogenous Network Formation in the Laboratory

  • Bogachan Celen

    (Columbia GSB)

  • Kyle Hyndman

    ()

    (SMU)

This paper provides an experimental test of a theory of endogenous network forma- tion. A group of subjects face a decision problem under uncertainty. The subjects are endowed with a private information about the fundamentals of the problem, and they are supposed to make a decision one after the other. The key feature of the experiment is that a subject can observe the decisions of the preceding subjects by forming links. A link is costly, yet it enables a subject to observe previous decisions of those to whom he is linked. We show that subjects respond to changes in the information structure and the cost of link formation in the expected manner. However, we also show that behavior systematically deviates from the Bayesian benchmark as subjects form more links than theory predicts. Subjects also exhibit a tendency to conform rather than follow their own information. In order to explain this pattern, we provide an econo- metric model that posits that subjects care about their relative standing in the group. We show that the modified model provides a better fit than a standard QRE.

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Paper provided by Southern Methodist University, Department of Economics in its series Departmental Working Papers with number 0701.

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Date of creation: Jan 2007
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Handle: RePEc:smu:ecowpa:0701
Contact details of provider: Postal:
Department of Economics, P.O. Box 750496, Southern Methodist University, Dallas, TX 75275-0496

Phone: 214-768-2715
Fax: 214-768-1821
Web page: http://www.smu.edu/economics

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  14. Sushil Bikhchandani & David Hirshleifer & Ivo Welch, 2010. "A theory of Fads, Fashion, Custom and cultural change as informational Cascades," Levine's Working Paper Archive 1193, David K. Levine.
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  17. Kelly, M. & O'Grada, C., 1999. "Market Contagion: Evidence from the Panics of 1854 and 1857," Papers 99/19, College Dublin, Department of Political Economy-.
  18. Gale, Douglas, 1996. "What have we learned from social learning?," European Economic Review, Elsevier, vol. 40(3-5), pages 617-628, April.
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