Z:gnu-www-ja-frank--ea2c7e-Table 1 shows the monetary pay/en

Table 1 shows the monetary payoffs in dollars to two players, X and Y, in a standard prisoner's dilemma. In Table 1, as in all prisoner's dilemmas, each player gets a higher payoff when each cooperates than when each defects. But when one player's strategy is fixed, the other player always gets a higher payoff by defecting than by cooperating; and hence the dilemma. By following individual self-interest, each player does worse than if each had cooperated.