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Le prix des titres comme véhicule de l’information: une approche en équilibre général

Published online by Cambridge University Press:  17 August 2016

Hubert Stahn
Hubert Stahn*
Affiliation:
B.E.T.A. (Bureau d’économie théorique et appliquée), Université Louis Pasteur, Strasbourg I
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Résumé

Dans ce travail, j’introduis une asymétrie d’information dans un modèle d’équilibre général caractérisé par l’incertitude et l’existence d’un système incomplet de marchés financiers. Un concept d’équilibre à anticipations rationnelles est associé à ce modèle à 1 bien et S états de nature et l’on montre qu’il existe une classe générique d’économies pour lesquelles le prix d’équilibre sur les marchés financiers est parfaitement révélateur des asymétries d’information. De ce point de vue, ce modèle s’inscrit dans la continuité de la contribution de Radner [1968] tout en exploitant les développements récents de la théorie des marchés incomplets.

Summary

Summary

In this paper I introduce asymetric information in a general equilibrium model characterized by uncertainty and the existence of incomplete financial markets. This model of one good and S states of nature is associated with the concept of equilibrium with rational expectations; and we show that there exists a generic class of economies for which the equilibrium price in the financial markets is perfectly revealing of the information asymmetries. From that point of view, the model follows the ideas of Radner[1968] yet makes use of the recent developements in the theory of incomplete markets.

Keywords

G14D5G14D5
Type
Research Article
Information
Recherches Économiques de Louvain/ Louvain Economic Review , Volume 62 , Issue 1 , 1996 , pp. 73 - 94
Copyright
Copyright © Université catholique de Louvain, Institut de recherches économiques et sociales 1996 

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Footnotes

*

Ce travail a bénéficié de l’appui financier du Ministère de l’Education Nationale dans le cadre de l’opération thématique «Recomposition du Champ Juridique». Je voudrais aussi remercier deux rapporteurs anonymes de leurs remarques. Je reste néanmoins seul responsable des erreurs et omissions.

References

Bibliographie

Allen, B. [1981], Generic existence of completely revealing equilibria for economies with uncertainty when price convey information, Econometrica, n° 49, pp. 1173–1199.Google Scholar
Allen, B. [1982], Strict rational expectation equilibrium with diffuseness, Journal of Economic Theory, 27(1), pp. 2–46.Google Scholar
Anderson, R. et Sonnenschein, H. [1982], On the existence of rational expectations equilibrium, Journal of Economic Theory, 26(2), pp. 261–278.Google Scholar
Anderson, R. et Sonnenschein, H. [1985], Rational expectation equilibrium with econometric models, Review of Economic studies, 52(3), pp. 359–369.Google Scholar
Cass, D. [1984], Competitive equilibrium with incomplete financial markets, Caress Working Paper, University of Pennsylvania.Google Scholar
Cass, D. [1985], On the number of equilibrium allocations with incomplete financial markets, Caress Working Paper, University of Pennsylvania.Google Scholar
Duffie, D. et Shafer, W. [1985], Equilibrium in incomplete markets I: A basic model of generic existence, Journal of Mathematical Economics, 14(3), pp. 285–300.Google Scholar
Duffie, D. et Shafer, W. [1986], Equilibrium in incomplete markets II : Generic existence in stochastic economies, Journal of Mathematical Economics, 15(3), pp. 199–216.Google Scholar
Geanakoplos, J. (éd.) [1990], Special issue on Incomplete Markets, Journal of Mathematical Economics, 39(Sp.issue).Google Scholar
Geanakoplos, J. et Polemarchakis, H. [1986], Existence, regularity and constrained suboptimality of competitive allocation when markets are incomplet, in Heller W., W. Starr, H. et Starret, D.. (éds), Essays in Honor of Kenneth Arrow, vol. 3, Cambridge, Cambridge University Press, pp. 65–95,Google Scholar
Guillemin, V. et Pollack, A. [1974], Differential Topology, Englewood Cliffs, Prentice Hall.Google Scholar
Hlrsch, M.W. [1976], Differential Topology, Berlin, Springer Verlag.Google Scholar
Jordan, J. [1982], The generic existence of rational expectation equilibrium in the higher dimensional case, Journal of Economic Theory, 26(2), pp. 224–243.Google Scholar
Jordan, J. [1983], On the efficient market hypothesis, Econometrica, 51(5), pp. 1325–1344.Google Scholar
Mas-Colell, A. [1985], The Theory of General Economic Equilibrium : A differentiable Approach, Cambridge, Cambridge University Press.Google Scholar
Mas-Colell, A. [1991], Indeterminacy in incomplete market economies, Economic Theory, 1(1), pp. 45–61.Google Scholar
Polemarchakis, H.M. et Siconolfi, P. [1991], Asset markets and the information revealed by prices, Core Discussion Paper, Université Catolique de Louvain.Google Scholar
Polemarchakis, H.M. et Siconolfi, P. [1993], Asset markets and the information revealed by prices, Economic Theory, 3(4), pp. 645–661.Google Scholar
Radner, R. [1968], Competitive equilibrium under uncertainty, Econometrica, 36(1), pp. 31–56.Google Scholar
Radner, R. [1972], Existence of equilibrium of plans, prices and price expectation in a sequence of markets, Econometrica, 40(2), pp. 286–303.Google Scholar
Radner, R. [1979], Rational expectation equilibrium : generic existence and the information revealed by prices, Econometrica, 47(3), pp. 655–678.Google Scholar
Radner, R [1982], Equilibrium under uncertainty, in Arrow, K.J. et Intriligator, M.D. (éds), Handbook of Mathematical Economics, vol. 2, Amsterdam, North Holland, pp. 923–1006.Google Scholar