Question

In an infinitely repeated prisoner’s dilemma game the following strategy will solve the game if both players employ it

Group of answer choices

1) A Dead Trigger Strategy

2) An Optimal Trigger Strategy

3) A Tit-for-Tat Strategy

4) All of the above

5) None of the above

Answer 1

Option 5) is correct i.e None of the above.

In infinitely-repeated games we can consider trigger strategies.

A trigger strategy essentially threatens other players with a “worse,” punishment, action if they deviate from an implicitly agreed actionprofile.
A non-forgiving trigger strategy (or grim trigger strategy) s would involve this punishment forever after a single deviation.

A trigger strategy usually applied to repeated prisoner's dilemmas in which a player begins by cooperating in the first period, and continues to cooperate until a single defection by her opponent, following which, the player defects forever. Grim trigger is a severe trigger strategy since a single defection brings about an eternal end to cooperation, in contrast to the much more forgiving tit for tat.