Rock-Paper-Scissors; A New and Elegant Proof

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Date

2007-09-12

Authors

Nouweland, Anne van den

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Publisher

University of Oregon, Dept of Economics

Abstract

I provide an elegant proof identifying the unique mixed Nash equilibrium of the Rock-Paper-Scissors game. The proof is based on intuition rather than elimination of cases. It shows that for any mixed strategy other than the one that puts equal probability on each of a player’s actions, it holds that this strategy is not a best response to any mixed strategy that is a best response to it.

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7 p.

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