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The Effect of Short–Selling on the Aggregation of Information in an Experimental Asset Market

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Marc Vorsatz
Helena Veiga

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Abstract

We show by means of a laboratory experiment that the relaxation of short–selling constraints causes the price of both an overvalued and an undervalued asset to decrease. Hence, the aggregation of information by the market price becomes better in case the asset is overvalued but worse if the asset is undervalued. With respect to payoffs, we find that not only uninformed but also some of the imperfectly informed traders suffer from the weakening of short–selling constraints.

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Paper provided by FEDEA in its series Working Papers with number 2008-26.

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Date of creation: Jul 2008
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Handle: RePEc:fda:fdaddt:2008-26

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  1. Veiga, Helena & Vorsatz, Marc, 2006. "Price Manipulation in an Experimental Asset Market," Research Memoranda 024, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization. [Downloadable!]
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  2. Miller, Edward M, 1977. "Risk, Uncertainty, and Divergence of Opinion," Journal of Finance, American Finance Association, vol. 32(4), pages 1151-68, September. [Downloadable!] (restricted)
  3. Plott, Charles R & Sunder, Shyam, 1982. "Efficiency of Experimental Security Markets with Insider Information: An Application of Rational-Expectations Models," Journal of Political Economy, University of Chicago Press, vol. 90(4), pages 663-98, August. [Downloadable!] (restricted)
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  4. Sunder, Shyam, 1992. "Market for Information: Experimental Evidence," Econometrica, Econometric Society, vol. 60(3), pages 667-95, May. [Downloadable!] (restricted)
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  5. Noeth, Markus & Camerer, Colin F. & Plott, Charles R. & Webber, Martin, 1999. "Information Aggregation in Experimental Asset Markets: Traps and Misaligned Beliefs," Working Papers 1060, California Institute of Technology, Division of the Humanities and Social Sciences. [Downloadable!]
  6. Forsythe, Robert & Palfrey, Thomas R & Plott, Charles R, 1982. "Asset Valuation in an Experimental Market," Econometrica, Econometric Society, vol. 50(3), pages 537-67, May. [Downloadable!] (restricted)
  7. Camerer, Colin & Weigelt, Keith, 1991. "Information Mirages in Experimental Asset Markets," Journal of Business, University of Chicago Press, vol. 64(4), pages 463-93, October. [Downloadable!] (restricted)
  8. Diamond, Douglas W. & Verrecchia, Robert E., 1987. "Constraints on short-selling and asset price adjustment to private information," Journal of Financial Economics, Elsevier, vol. 18(2), pages 277-311, June. [Downloadable!] (restricted)
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