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Core (game theory) : ウィキペディア英語版
Core (game theory)
In game theory, the core is the set of feasible allocations that cannot be improved upon by a subset (a ''coalition'') of the economy's consumers. A coalition is said to ''improve upon'' or ''block'' a feasible allocation if the members of that coalition are better off under another feasible allocation that is identical to the first except that every member of the coalition has a different consumption bundle that is part of an aggregate consumption bundle that can be constructed from publicly available technology and the initial endowments of each consumer in the coalition.
An allocation is said to have the ''core property'' if there is no coalition that can improve upon it. The core is the set of all feasible allocations with the core property.
==Origin==
The idea of the core already appeared in the writings of , at the time referred to as the ''contract curve'' . Even if von Neumann and Morgenstern considered it an interesting concept, they only worked with zero-sum games where the core is always ''empty''. The modern definition of the core is due to .

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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