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Price Manipulation in an Experimental Asset Market

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Author Info
Veiga, Helena
Vorsatz, Marc (METEOR)

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Abstract

We analyze in the laboratory whether an uninformed trader is able to manipulate the price of a financial asset. To do so, we compare the results of two different experimental treatments. In the Benchmark Treatment, twelve subjects trade a common value asset that takes either a high or a low value. Information is distributed asymmetrically, only three outof twelve subjects know the actual value of the asset. The Manipulation Treatment is identical to the Benchmark Treatment apart from the fact that we introduce a computer program as an additional trader. This manipulation program buys a fixed number of shares in the beginning of a trading period and sells them afterwards again. Our results show that the last contract price is significantly higher in the Manipulation Treatment if the asset takes a low value and that there are no price differences between the two treatments if the value of the asset is high. Moreover, this simple manipulation program is, at least in some instances, profitable.

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Paper provided by Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization in its series Research Memoranda with number 024.

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Date of creation: 2006
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Handle: RePEc:dgr:umamet:2006024

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Keywords: financial economics and financial management ;

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  2. Elisha A. Pazner & David Schmeidler, 1975. "Egalitarian Equivalent Allocations: A New Concept of Economic Equity," Discussion Papers 174, Northwestern University, Center for Mathematical Studies in Economics and Management Science. [Downloadable!]
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  3. Jackson, Matthew O, 1992. "Implementation in Undominated.Strategies: A Look at Bounded Mechanisms," Review of Economic Studies, Blackwell Publishing, vol. 59(4), pages 757-75, October. [Downloadable!] (restricted)
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  4. Moore, John & Repullo, Rafael, 1988. "Subgame Perfect Implementation," Econometrica, Econometric Society, vol. 56(5), pages 1191-1220, September. [Downloadable!] (restricted)
  5. Bhaskar Dutta & Arunava Sen & Rajiv Vohra, 1994. "Nash implementation through elementary mechanisms in economic environments," Review of Economic Design, Springer, vol. 1(1), pages 173-203, December. [Downloadable!] (restricted)
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  7. BOCHET, Olivier, 2005. "Nash implementation with lottery mechanisms," CORE Discussion Papers 2005072, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE). [Downloadable!]
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  8. William Thomson, 2004. "Divide-and-Permute," RCER Working Papers 510, University of Rochester - Center for Economic Research (RCER). [Downloadable!]
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  9. Abreu, Dilip & Sen, Arunava, 1990. "Subgame perfect implementation: A necessary and almost sufficient condition," Journal of Economic Theory, Elsevier, vol. 50(2), pages 285-299, April. [Downloadable!] (restricted)
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  11. William Thomson, 1999. "Monotonic extensions on economic domains," Review of Economic Design, Springer, vol. 4(1), pages 13-33. [Downloadable!] (restricted)
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  12. Nicolo, Antonio & Perea, Andres, 2005. "Monotonicity and equal-opportunity equivalence in bargaining," Mathematical Social Sciences, Elsevier, vol. 49(2), pages 221-243, March. [Downloadable!] (restricted)
  13. Thomson, William, 1988. "A study of choice correspondences in economies with a variable number of agents," Journal of Economic Theory, Elsevier, vol. 46(2), pages 237-254, December. [Downloadable!] (restricted)
  14. Olivier, BOCHET & Franois, MANIQUET, 2006. "Virtual Nash implementation with admissible support," Discussion Papers (ECON - Département des Sciences Economiques) 2006043, Université catholique de Louvain, Département des Sciences Economiques. [Downloadable!]
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Cited by:
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  1. Helena Veiga & Marc Vorsatz, 2008. "The effect of short-selling of the aggregation of information in an experimental asset market," Statistics and Econometrics Working Papers ws083808, Universidad Carlos III, Departamento de Estadística y Econometría. [Downloadable!]
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  2. Helena Veiga & Marc Vorsatz, 2008. "Aggregation and dissemination of information in experimental asset markets in the presence of a manipulator," Statistics and Econometrics Working Papers ws084110, Universidad Carlos III, Departamento de Estadística y Econometría. [Downloadable!]
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