Herves-Beloso, Carlos and Meo, Claudia and Moreno Garcia, Emma (2011): On core solutions in economies with asymmetric information.
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In a scenario with a continuum of asymmetrically informed agents, we analyze how the initial information of a trader may be altered when she becomes a member of a coalition. In contrast to a perfect competition frame, we first show that neither arbitrarily small coalitions nor large coalitions are enough to block an allocation which is not in the core, due to the market failure produced by asymmetric information. However, under mild assumptions, we extend the characterizations of the core provided by Vind and Schmeidler (1972) to economies with asymmetrically informed traders. We then focus on information sharing rules based on the coalitions' size. Assuming the existence of coalitions to which the sharing rule associates an information finer than all the others, we show that the corresponding cores coincide with the one defined by this finest information. Finally, characterizations for the weak fine, the fine and the private core are obtained as particular cases of this equivalence theorem.
|Item Type:||MPRA Paper|
|Original Title:||On core solutions in economies with asymmetric information|
|Keywords:||Coalitions, asymmetric information economies, information sharing, blocking mechanisms, core|
|Subjects:||D - Microeconomics > D7 - Analysis of Collective Decision-Making > D71 - Social Choice ; Clubs ; Committees ; Associations
C - Mathematical and Quantitative Methods > C0 - General > C02 - Mathematical Methods
D - Microeconomics > D8 - Information, Knowledge, and Uncertainty > D82 - Asymmetric and Private Information ; Mechanism Design
D - Microeconomics > D5 - General Equilibrium and Disequilibrium > D51 - Exchange and Production Economies
|Depositing User:||Carlos Hervés-Beloso|
|Date Deposited:||26. Apr 2011 13:19|
|Last Modified:||16. Feb 2013 02:23|
Allen, B. (2006): Market games with asymmetric information:the core. Economic Theory 29, 465--487.
Aumann, R.J. (1972): Markets with a continuum of traders. Econometrica 32, 39--50.
Evren, O.; Hüsseinov, F. (2008):Theorems on the core of an economy with infinitely many commodities and consumers. Journal of Mathematical Economics 44, 1180--1196.
Grodal, B. (1972): A second remark on the core of an atomless economy. Econometrica 40, 581--583.
Hervés-Beloso, C.; Moreno-García, E.;Núñez-Sanz, C.;Páscoa, M. (2000): Blocking efficacy of small coalitions in myopic economies. Journal of EconomicTheory 93, 72--86.
Hervés-Beloso, C.; Moreno-García, E.; Yannelis, N.(2005): Characterization and incentive compatibility of Walrasian expectations equilibrium in infinite dimensional commodity spaces. Economic Theory 26, 361--381.
Hervés-Beloso, C.; Moreno-García, E.; Yannelis, N.C. (2005): An equivalence theorem for a differential information economy. Journal of Mathematical Economics 41, 844--856.
Pesce, M. (2010): On mixed markets with asymmetric information. Economic Theory 45, 23--53.
Schmeidler, D. (1972): A remark on the core of an atomless economy. Econometrica 40, 579--580.
Serrano, R., Vohra, R., Volij, O. (2001): On the failure of core convergence in economies with asymmetric information. Econometrica 69, 1685-1696.
Vind, K. (1972): A third remark on the core of an atomless economy. Econometrica 40, 585--586.
Wilson, R. (1978): Information, efficiency and the core of an economy. Econometrica 46, 807--816.
Yannelis, N. (1991): The core of an economy with differential information. Economic Theory 1, 183--198.