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Published May 1994 | Submitted
Journal Article Open

Undominated Nash Implementation in Bounded Mechanisms


We study implementation in undominated Nash equilibrium by bounded mechanisms. (An undominated Nash equilibrium is a Nash equilibrium in which no agent uses a weakly dominated strategy. A mechanism is bounded if every dominated strategy is dominated by some undominated strategy.) We identify necessary conditions and sufficient conditions for such implementation. These conditions are satisfied in virtually all economic environments, and are also satisfied by interesting correspondences from the social choice literature. For economic settings, we provide a particularly simple implementing mechanism for which the undominated equilibrium outcomes coincide with those obtained from the iterative elimination of weakly dominated strategies.

Additional Information

© 1994 Academic Press. Received October 29, 1991. We acknowledge financial support form the National Science Foundation and comments from participants at seminars at Harvard University, the Universitat Autonoma de Barcelona, the Decentralization Conference at Cornell University, and the University of Toronto. The paper was written while the second author was visiting GREMAQ at the University of Toulouse, whose hospitality and financial support is gratefully acknowledged.

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