Map of world time zones for He shared the prize with John HARSANYI of Hungary and Reinhard SELTEN of Germany. Game theory and Nash Equilibrium. Nash encountered game theory as a graduate student at Princeton. A popular book by John von Neumann and Oskar Morgenstern, Theory of Games and Economic Behavior, contained the first formalization of a general theory suitable for the study of conflict of interest between individuals, countries, or organizations. As a metaphor for a real-life strategic situation, a game can be either cooperative or non-cooperative. In a cooperative game, binding agreements between individuals (players) are always possible, while a non-cooperative game excludes this possibility unless explicitly modeled. Nash is credited with having been the first to introduce a clear formal distinction between cooperative and non-cooperative games. Map of world time zones 2016.