AAAI Publications, Twenty-Fourth AAAI Conference on Artificial Intelligence

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Private and Third-Party Randomization in Risk-Sensitive Equilibrium Concepts
Mickey Brautbar, Michael Kearns, Umar Syed

Last modified: 2010-07-04


We consider risk-sensitive generalizations of Nash and correlated equilibria in noncooperative games. We prove that, except for a class of degenerate games, unless a two-player game has a pure Nash equilibrium, it does not have a risk-sensitive Nash equilibrium. We also show that every game has a risk-sensitive correlated equilibrium. The striking contrast between these existence results is due to the different sources of randomization in Nash (private randomization) and correlated equilibria (third-party randomization).


game theory

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