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We study strategy-proof rules for choosing between two alternatives. We consider the full preference domain which allows for indifference. In this framework, for strategy proof rules, ontoness does not imply efficiency. We weaken the requirement of efficiency to ontoness and characterizes the...
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the only one satisfying anonymity, neutrality, and strategy-proofness (SP). For more than two alternatives, anonymity and … concepts in an intuitive manner. Dropping anonymity and keeping neutrality, we identify and analyze the first known nontrivial … family of K-SP rules, namely semi-dictator rules. For two agents, semi-dictator rules are characterized by local unanimity …
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Call a mechanism that associates each profile of preferences over candidates to an ambiguous act an Ambiguous Social Function (ASCF). This paper studies the strategy-proofness of ASCFs. We find that an ASCF is unanimous and strategyproof if and only if there exists a nonempty subset of voters,...
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