hard · GMAT Verbal
In the context of game theory, the 'Prisoner's Dilemma' illustrates why two completely rational individuals might not cooperate, even if it appears that it is in their best interest to do so. The game is 'zero-sum' only if one assumes a fixed pool of resources, but in repeated iterations, 'tit-for-tat' strategies often emerge. These strategies rely on a player mimicking the opponent's previous move, fostering long-term cooperation through a credible threat of retaliation.
Which of the following, if true, would most undermine the effectiveness of a 'tit-for-tat' strategy?
- The players are permitted to communicate openly and coordinate their moves before each round.
- Both players maintain a consistently high level of mutual trust in each other's underlying rationality.
- The cost of defecting is significantly higher than the modest reward a player earns for choosing to cooperate.
- The game is played for a fixed, known number of rounds, and both players know which round is the last.
- One of the two players occasionally makes a random, unintended error when copying the opponent's prior move.
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