来自《耶鲁大学开放课程：博弈论第21集第21集》

So here's bad news.

这里有个坏消息
The bad news is, we'd hoped that

坏消息是我们希望
by having repeated interaction in the Prisoners' Dilemma,

通过在囚徒困境中不断重复互动
we would be able to sustain cooperation.

可以形成持续的合作
That's been our hope since day one of the class.

那是我们第一天上课以来的希望
In fact, we stated it kind of confidently

事实上我们在第一节课上
in the first day of the class,

觉得很有信心可能解决这个问题
and we kind of intuitively believe it.

我们还一直这么认为的
But what we're discovering is,

但是我们发现的是
even if you played this game for 500 times and then stopped,

即使你重复这个博弈500次然后才停
you wouldn't be able to sustain cooperation in equilibrium

你也无法达到持续合作的均衡
because we're going to get unraveling in the last stage

因为我们会在博弈的最后阶段崩解