Strategy-Proofness and the Tops-Only Property
Working Paper No. 04-W09R
John A. Weymark
ABSTRACT [article]
A social choice function satisfies the tops-only property if the chosen alternative only depends on each person's report of his most-preferred
alternatives on the range of this function. On many domains, strategy-proofness implies the
tops-only property, provided that the range of the social choice function satisfies some
regularity condition. The existing proofs of this result are model specific. In this article, a
general proof strategy is proposed for showing that a strategy-proof social choice
function satisfies the tops-only property when everyone has the same set of admissible preferences.
Keywords and Phrases: Social Choice, strategy-proofness, option sets, tops-only property
JEL Classification Number: D71, D82