来自《耶鲁大学开放课程：博弈论 第21集 第21集》

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  I want to focus on the issue of cooperation
  我讲的重点都是合作
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  The question behind everything this week is going to be
  这个星期我们要讨论的重点问题
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  can repeated interaction among players
  将会是参与者之间的重复互动
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  both induce and sustain cooperative behavior
  合作行为减少或依然持续
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  or if you like "good behavior"
  或者可以说是你是否喜欢"好行为"
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  Our canonical example is going to be Prisoners' Dilemma
  在这里规范的例子是囚徒困境
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  Way back in the very first class
  在第一节课的时候
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  we talked about Prisoners' Dilemma
  我们就讲到了囚徒困境
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  and we mentioned that playing the game repeatedly
  我们当时也提到过如果多次重复这个博弈
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  might be able to get us out of the dilemma.
  也许可以让我们走出困境
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  It might be able to enable us to sustain cooperation.
  多次重复博弈也许可以让合作持续
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  And what's going to be good about
  在这里好的标准