OAKU HIROSHI

This paper analyses evolutionary models with delays in players' observations, we apply best response dynamics to symmetric 2 X 2 games, in particular the coordination game and the game with no symmetric pure strategy equilibrium. When the dynamics have no delay, their solutions converge to symmetric Nash equilibria monotonically, However when we introduce delays to the dynamics, although these dynamics represented by differential difference equations are seemingly simple, it shows that they have periodic solutions.