Axiomatizations Of Symmetrically Weighted Solutions
AbstractIf the excesses of the coalitions in a transferable utility game are weighted, then we show that the arising weighted modifications of the well-known (pre)nucleolus and (pre)kernel satisfy the equal treatment property if and only if the weight system is symmetric in the sense that the weight of a subcoalition of a grand coalition may only depend on the grand coalition and the size of the subcoalition. Hence, the symmetrically weighted versions of the (pre)nucleolus and the (pre)kernel are symmetric, i.e., invariant under symmetries of a game. They may, however, violate anonymity, i.e., they may depend on the names of the players. E.g., a symmetrically weighted nucleolus may assign the classical nucleolus to one game and the per capita nucleolus to another game. We generalize Sobolev’s axiomatization of the prenucleolus and its modification for the nucleolus as well as Peleg’s axiomatization of the prekernel to the symmetrically weighted versions. Only the reduced games have to be replaced by suitably modified reduced games whose definitions may depend on the weight system. Moreover, it is shown that a solution may only satisfy the mentioned sets of modified axioms if the weight system is symmetric.
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Bibliographic InfoPaper provided by Tilburg University, Center for Economic Research in its series Discussion Paper with number 2013-007.
Date of creation: 2013
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TU game · Nucleolus · Kernel;
Other versions of this item:
- Kleppe, John & Reijnierse, Hans & Sudhölter, Peter, 2013. "Axiomatizations of symmetrically weighted solutions," Discussion Papers of Business and Economics 3/2013, Department of Business and Economics, University of Southern Denmark.
- C71 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Cooperative Games
This paper has been announced in the following NEP Reports:
- NEP-ALL-2013-03-02 (All new papers)
- NEP-GTH-2013-03-02 (Game Theory)
- NEP-HPE-2013-03-02 (History & Philosophy of Economics)
- NEP-MIC-2013-03-02 (Microeconomics)
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