Van Damme [1984] introduces the concept of quasi-perfect equilibrium, which re-fines sequential equilibrium as well as normal-form perfect equilibrium. It has been argued by Mertens [1995] that quasi-perfection is conceptually superior to extensive-form perfection, since quasi-perfection...

The computational study of games is receiving increasing attention both in game theory and computer science. The challenge is distinguishing computationally tractable problems (also said easy), admitting polynomial–time algorithms, from the intractable ones (also said hard). In this paper, we...