Scandinavian Working Papers in Economics

Working Papers,
Lund University, Department of Economics

No 1999:1: The Proof of the Gibbard-Satterthwaite Theorem Revisited

Lars-Gunnar Svensson ()
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Lars-Gunnar Svensson: Department of Economics, Lund University, Postal: Department of Economics, School of Economics and Management, Lund University, Box 7082, S-220 07 Lund, Sweden

Abstract: This paper provides three short and very simple proofs of the classical Gibbard-Satterthwaite theorem. The theorem is first proved in the case with only two individuals in the economy. The many individual case follows then from an induction argument (over the number of individuals). The proof of the theorem is further simplified when the voting rule is assumed to be neutral.

Keywords: voting; strategy-proofness

JEL-codes: D70

11 pages, March 8, 1999

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