Ex-post Implementation with Interdependent Valuations

Benny Moldovanu () and Moritz Meyer-ter-Vehn ()

No 02-08, Sonderforschungsbereich 504 Publications from Sonderforschungsbereich 504, Universität Mannheim, Sonderforschungsbereich 504, University of Mannheim

Abstract: We consider a social choice setting with multidimensional signals and interdependent valuations. Such frameworks have been recently and increasingly used in order to study multi-object auctions. We obtain concise characterizations of ex-post implementable (not necessarily efficient) social choice functions in terms of affine functions that associate a weight to each agent and to each alternative. These characterizations can greatly reduce the complexity of the search for a constrained efficient (i.e., second best) mechanism in the generic cases where efficient outcomes cannot be implemented.

Pages: 21 pages
Date: 2002-01-13
Note: We wish to thank Philippe Jehiel for helpful comments.
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Citations: View citations in EconPapers (5)

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