Group Strategy-Proofness in Private Good Economies

Recognition Program

Authors: Salvador Barberà, Dolors Berga and Bernardo Moreno

American Economic Review, Vol. 106, No 4, 1073-1099, April, 2016

Many salient rules to allocate private goods are not only strategyproof, but also group strategy-proof, in appropriate domains of definition, hence diminishing the traditional conflict between incentives and efficiency. That is so for solutions to matching, division, cost sharing, house allocation, and auctions, in spite of the substantive disparity between these cases. In a general framework encompassing all of them, we prove that the equivalence between the two forms of strategy-proofness is due to an underlying common structure that transcends the many differences between the contexts and the mechanisms for which it holds.

This paper originally appeared as Barcelona School of Economics Working Paper 801
This paper is acknowledged by the Barcelona GSE Research Recognition Program