Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
A Nash equilibrium $$x$$ x of a normal-form game $$G$$ G is essential if any perturbation of $$G$$ G has an equilibrium close to $$x$$ x . Using payoff perturbations, we identify a new collection of games containing a dense, residual subset of games whose Nash equilibria are all essential. This collection covers economic examples that cannot be handled by extant results and subsumes the sets of games considered in the literature. Copyright Springer-Verlag Berlin Heidelberg 2015