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OLIGARCHY FOR SOCIAL CHOICE CORRESPONDENCES AND STRATEGY-PROOFNESS

机译:社会选择对应的寡头策略和策略防伪

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We study the existence of a group of individuals which has some decisive power for social choice correspondences that satisfy a monotonicity property which we call modified monotonicity. And we examine the relation between modified monotonicity and strategy-proofness of social choice correspondences according to the definition by Duggan and Schwartz (2000). We will show mainly the following two results. (1) Modified monotonicity implies the existence of an oligarchy. An oligarchy is a group of individuals such that it has some decisive power (semi-decisiveness), and at least one of the most preferred alternatives of every its member is always chosen by any social choice correspondence. (2) Strategy-proofness of social choice correspondences is equivalent to modified monotonicity.
机译:我们研究了一组个体的存在,这些个体对于满足单调性的社会选择对应具有决定性的作用,我们称之为修正单调性。然后,我们根据Duggan和Schwartz(2000)的定义研究了修正的单调性与社会选择对应关系的策略证明性之间的关系。我们将主要显示以下两个结果。 (1)修正的单调性意味着存在寡头现象。寡头政治是一群具有决定性力量(半决定性)的人,并且每个成员的至少一个最喜欢的替代方案始终由任何社会选择对应关系来选择。 (2)社会选择对应的策略证明性等同于修正的单调性。

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