Abstract
Nash's "mass action" interpretation of his equilibrium concept for on-cooperative games, boundedly rational players are repeatedly and randomly drawn from large populations to play the game, one population for each player position. The players are assumed to base their strategy choice on the strategies' observed "relative advantage". This note formally examines this interpretation in terms of a few classes of population dynamics based on imitative and innovative adaption, and innovative adaption with memory, respectively. Extending some results in evolutionary game theory, connections between long-run aggregate behaviour and Nash equilibrium are established.