Efficiency under a combination of ordinal and cardinal information on preferences
AbstractAbstract Consider a collection of m indivisible objects to be allocated to n agents, where m>=n. Each agent falls in one of two distinct categories: either he (a) has a complete ordinal ranking over the set of individual objects, or (b) has a set of "plausible" benchmark von Neumann-Morgenstern (vNM) utility functions in whose positive span his "true" utility is known to lie. An allocation is undominated if there does not exist a preference-compatible profile of vNM utilities at which it is Pareto dominated by another feasible allocation. Given an undominated allocation, we use the tools of linear duality theory to construct a profile of vNM utilities at which it is ex-ante welfare maximizing. A finite set of preference-compatible vNM utility profiles is exhibited such that every undominated allocation is ex-ante welfare maximizing with respect to at least one of them. Given an arbitrary allocation, we provide an interpretation of the constructed vNM utilities as subgradients of a function which measures worst-case domination.
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Bibliographic InfoArticle provided by Elsevier in its journal Journal of Mathematical Economics.
Volume (Year): 47 (2011)
Issue (Month): 2 (March)
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Web page: http://www.elsevier.com/locate/jmateco
Random assignment Efficiency Duality Linear programming;
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