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Endogenous Network Formation In the Laboratory

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  • Celen, Bogachan
  • Hyndman, Kyle

Abstract

This paper provides an experimental test of a theory of endogenous network formation. 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 econometric 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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Bibliographic Info

Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 1440.

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Date of creation: 15 Dec 2006
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Handle: RePEc:pra:mprapa:1440

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Keywords: Social learning; social interaction; networks; network formation;

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Cited by:
  1. Eliaz, Kfir & Schotter, Andrew, 2009. "Paying for Confidence: An Experimental Study of the Demand for Non-Instrumental Information," CEPR Discussion Papers 7415, C.E.P.R. Discussion Papers.
  2. Di Cagno, Daniela & Sciubba, Emanuela, 2010. "Trust, trustworthiness and social networks: Playing a trust game when networks are formed in the lab," Journal of Economic Behavior & Organization, Elsevier, vol. 75(2), pages 156-167, August.

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