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Is what is good for each good for all? Individual rationality and social efficiency in an information contagion model

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Author Info
David Lane () (University of Modena)
Abstract

When new competing products enter a market, a variety of informational and structural mechanisms may play a role in determining the market shares that each product will obtain. In this talk, I introduce a class of models designed to elucidate one such mechanism: the feedback introduced through private information-gathering about product quality carried out by prospective purchasers querying previous purchasers. Theoretical and computational analysis of these models reveals that the way in which purchasers assimilate the information they obtain can have strong effects on ultimate market structure. In particular, some decision rules will lead to more efficient social outcomes (that is, higher market share for a superior product) than will Bayesian optimization. In addition, more information at the individual level need not lead to better outcomes at the aggregate level. Experimental results shedding light on these phenomena will be reviewed and techniques for analyzing these results will be discussed.

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Paper provided by Society for Computational Economics in its series Computing in Economics and Finance 1996 with number _033.

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Handle: RePEc:sce:scecf6:_033

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Postal: Department of Econometrics, University of Geneva, 102 Bd Carl-Vogt, 1211 Geneva 4, Switzerland
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  1. Arthur, W. Brian & Lane, David A., 1993. "Information contagion," Structural Change and Economic Dynamics, Elsevier, vol. 4(1), pages 81-104, June. [Downloadable!] (restricted)
  2. Ellison, Glenn & Fudenberg, Drew, 1995. "Word-of-Mouth Communication and Social Learning," The Quarterly Journal of Economics, MIT Press, vol. 110(1), pages 93-125, February. [Downloadable!] (restricted)
  3. Narduzzo, Alessandro & Warglien, Massimo, 1996. "Learning from the Experience of Others: An Experiment on Information Contagion," Industrial and Corporate Change, Oxford University Press, vol. 5(1), pages 113-26.
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  4. Bassan, Bruno & Scarsini, Marco, 1995. "On the value of information in multi-agent decision theory," Journal of Mathematical Economics, Elsevier, vol. 24(6), pages 557-576. [Downloadable!] (restricted)
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This page was last updated on 2008-8-16.


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