Posterior Implementation versus Ex-Post Implementation

Philippe Jehiel (1, 2, 3) , Moritz Meyer-Ter-Vehn (4) , Benny Moldovanu (5) , William R. Zame (6)

1 PJSE - Paris-Jourdan Sciences Economiques
2 PSE - Paris School of Economics
3 UCL - University College of London [London]
4 SAP
5 University of Bonn
6 LBNL - Lawrence Berkeley National Laboratory [Berkeley]

Posterior implementation is a weaker concept than ex-post implementation. It requires that agents' strategies are optimal against others' strategies, given the precise information made available by the mechanism. Whereas ex-post implementation is generically impossible, we show by example that this need not be the case for posterior implementation.

Keywords: Posterior implementation; Ex-post implementation; Multi-dimensional types

Domains: Economics and Finance

Philippe Jehiel, Moritz Meyer-Ter-Vehn, Benny Moldovanu, William R. Zame. Posterior Implementation versus Ex-Post Implementation. Economics Letters, 2007, 97 (1), pp.70-73. ⟨10.1016/j.econlet.2007.02.023⟩. ⟨halshs-00754198⟩