Which of the following is true of game theory?
a. At a Nash equilibrium, all firms have an
incentive to change behavior.
b. A tit-for-tat strategy is a way to reward noncooperation and punish cooperation in a repeated game.
c. Cooperative strategies are equally likely in one-shot and repeated games.
d. Cooperation is more likely to occur in repeated games than in one-shot games.
e. Collusion is an example of a noncooperative game.