"Strategy-proofness" is one of the axioms that are most frequently used in the recent literature on social choice theory. It requires that by misrepresenting his preferences, no agent can manipulate the outcome of the social choice rule in his favor. The stronger requirement of "group strategy-proofness" is also often employed to obtain clear characterization results of social choice rules. Group strategy-proofness requires that no group of agents can manipulate the outcome in their favors. In this paper, we advocate "effective pairwise strategy-proofness." It is the requirement that the social choice rule should be immune to unilateral manipulation and "self-enforcing" pairwise manipulation in the sense that no agent of a pair has the incentive to betray his partner. We apply the axiom of effective pairwise strategy-proofness to three types of economies: public good economy, pure exchange economy, and allotment economy. Although effective pairwise strategy-proofness is seemingly a much weaker axiom than group strategy-proofness, effective pairwise strategy-proofness characterizes social choice rules that are analyzed by using different axioms in the literature.
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Paper provided by Institute of Social and Economic Research, Osaka University in its series ISER Discussion Paper with number
0629.
References listed on IDEAS Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
Barbera, Salvador & Jackson, Matthew O, 1995.
"Strategy-Proof Exchange,"
Econometrica,
Econometric Society, vol. 63(1), pages 51-87, January.
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Salvador Barbera & Matthew O. Jackson, 1993.
"Strategy-Proof Exchange,"
Discussion Papers
1021, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
[Downloadable!]
James Schummer, 1997.
"Manipulation Through Bribes,"
Discussion Papers
1207, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
[Downloadable!]
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