Dominant strategy implementation in economic environments

Abstract

We study dominant strategy implementation especially in economic environments. We first show that in general environments, strategy-proofness and quasi-strong-non-bossiness together are necessary and sufficient for dominant strategy implementation via the associated direct revelation mechanism. We next prove that in weak separable environments, strategy-proofness is sufficient for dominant strategy implementation, by using an augmented revelation mechanism similar to the one devised by Jackson, Palfrey, and Srivastava [Jackson, M.O., Palfrey, T.R., Srivastava, S., 1994. Undominated Nash implementation in bounded mechanisms. Games Econ. Behav. 6, 474–501]. Moreover, we focus on pure exchange economies without free disposal, and try to construct another augmented revelation mechanism that satisfies balancedness in and out of equilibrium, and which implements all strategy-proof social choice functions in dominant strategy equilibria.