منابع مشابه
A Ex-Post Equilibrium and VCG Mechanisms
Consider an abstract social choice setting with incomplete information, where the number of alternatives is large. Albeit natural, implementing VCG mechanisms is infeasible due to the prohibitive communication constraints. However, if players restrict attention to a subset of the alternatives, feasibility may be recovered. This paper characterizes the class of subsets which induce an ex-post eq...
متن کاملCharacterization of ex post equilibrium in the VCG combinatorial auctions
We prove that when the number of (potential) buyers is at least three, every ex post equilibrium in the Vickrey-Clarke-Groves combinatorial auction mechanisms is a bundling equilibrium and is symmetric. This complements a theorem proved in Holzman, Kfir-Dahav, Monderer, and Tennenholtz [6], according to which, the symmetric bundling equilibria are precisely those defined by a quasi field.
متن کاملEquilibrium in competitive insurance markets with ex ante adverse selection and ex post moral hazard
Existence of pure strategy equilibria is studied in health insurance markets that exhibit both ex ante adverse selection of the Rothschild–Stiglitz–Wilson type, and ex post hidden information moral hazard. It is found that ex post moral hazard has two offsetting effects on the existence of equilibrium, and that in general it is difficult to say whether an equilibrium is more or less likely to e...
متن کاملEx - ante and ex - post strong correlated
A strong correlated equilibrium is a strategy pro le that is immune to joint deviations. Di erent notions of strong correlated equilibria were de ned in the literature. One major di erence among those de nitions is the stage in which coalitions can plan a joint deviation: before (ex-ante) or after (ex-post) the deviating players receive their part of the correlated pro le. In this paper we prov...
متن کاملEx post implementation
We analyze the problem of fully implementing a social choice set in ex post equilibrium. We identify an ex post monotonicity condition that is necessary and in economic environments su¢ cient for full implementation in ex post equilibrium. We also identify an ex post monotonicity no veto condition that is su¢ cient. Ex post monotonicity is satis ed in all single crossing environments with stric...
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ژورنال
عنوان ژورنال: American Economic Review
سال: 2017
ISSN: 0002-8282
DOI: 10.1257/aer.p20171029