Perfect implementation

Sergei Izmalkov (), Matt Lepinski and Silvio Micali

Games and Economic Behavior, 2011, vol. 71, issue 1, 121-140

Abstract: Privacy and trust affect our strategic thinking, yet have not been precisely modeled in mechanism design. In settings of incomplete information, traditional implementations of a normal-form mechanism--by disregarding the players' privacy, or assuming trust in a mediator--may fail to reach the mechanism's objectives. We thus investigate implementations of a new type. We put forward the notion of a perfect implementation of a normal-form mechanism : in essence, a concrete extensive-form mechanism exactly preserving all strategic properties of , without relying on trusted mediators or violating the players' privacy. We prove that any normal-form mechanism can be perfectly implemented by a verifiable mediator using envelopes and an envelope-randomizing device. Differently from a trusted mediator, a verifiable one only performs prescribed public actions, so that everyone can verify that he is acting properly, and that he never learns any information that should remain private.

Keywords: Mechanism; design; Trust; Privacy (search for similar items in EconPapers)
Date: 2011
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Citations: View citations in EconPapers (4)

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Working Paper: Perfect Implementation (2010)
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