Viossat, Yannick - In: Journal of Mathematical Economics 44 (2008) 11, pp. 1152-1160
We investigate whether having a unique equilibrium (or a given number of equilibria) is robust to perturbation of the payoffs, both for Nash equilibrium and correlated equilibrium. We show that the set of n-player finite games with a unique correlated equilibrium is open, while this is not true...