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Publicité limitée de l'information et sur-réaction aux annonces lors des épisodes spéculatifs

  • Camille Cornand

    (GATE - Groupe d'analyse et de théorie économique - CNRS : UMR5824 - Université Lumière - Lyon II - Ecole Normale Supérieure Lettres et Sciences Humaines)

  • Frank Heinemann


    (Faculty of Economics - Ludwig Maximilians Universität München)

Le modèle de Morris et Shin [2002] montre que des annonces publiques imprécises peuvent coordonner les spéculateurs loin de la solution fondamentale par un phénomène de sur-réaction aux annonces. Le fort potentiel focal exercé par la connaissance commune est dommageable au bien-être lorsqu'il induit de la sur-réaction à un signal public imprécis. Pourtant, les expériences de laboratoire montrent que les agents sur-réagissent aux annonces, mais pas aussi fortement que ce que prédisent les modèles théoriques existants, fondés sur de l'information publique qui génère de la connaissance commune. Ce papier introduit la notion de publicité limitée de l'information qui semble mieux à même de rendre compte du degré réel de sur-réaction des agents.

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Paper provided by HAL in its series Post-Print with number halshs-00137477.

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Date of creation: May 2006
Date of revision:
Publication status: Published, Revue Economique, 2006, 57, 3, 399-405
Handle: RePEc:hal:journl:halshs-00137477
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  1. Camille Cornand & Frank Heinemann, 2004. "Optimal Degree of Public Information Dissemination," CESifo Working Paper Series 1353, CESifo Group Munich.
  2. Nagel, Rosemarie, 1995. "Unraveling in Guessing Games: An Experimental Study," American Economic Review, American Economic Association, vol. 85(5), pages 1313-26, December.
  3. Dorothea K¸bler & Georg Weizs”cker, 2004. "Limited Depth of Reasoning and Failure of Cascade Formation in the Laboratory," Review of Economic Studies, Wiley Blackwell, vol. 71(2), pages 425-441, 04.
  4. Frank Heinemann & Rosemarie Nagel & Peter Ockenfels, 2004. "The Theory of Global Games on Test: Experimental Analysis of Coordination Games with Public and Private Information," Econometrica, Econometric Society, vol. 72(5), pages 1583-1599, 09.
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