Mechanism design or implementation theory, which studies the design of institutions or mechanisms implementing collective decisions under different circumstances, has been a major research area in the last three decades. hannu Vartiainen's doctoral dissertation analyzes several issues in this...

Multi-choice games and fuzzy games both deal with the situations where the players have more than two participants levels. Two values have been proposed for the multi-choice games: Hsiao-Raghavan (1993) and Nouweland et al. (1995). The former one depends on an arbitrarily given weight, and Hsia...

We extend Kohlberg and Mertens' (1986) structure theorem concerning the Nash equilibrium correspondence to show that its graph is not only homeomorphic to the underlying space of games but that it is also unknotted. This is then shown to have some basic consequences for dynamics whose rest...