来自《耶鲁大学开放课程：金融理论 第10集 第10集》

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  I can do backward induction.
  我可以做逆向归纳法
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  So that's the word I want to describe which is going to
  我想用这个词来形容这个将要在
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  play a very important role in the future of the class,
  未来几节课发挥非常重要的作用的
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  backward induction.
  逆向归纳法
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  It says if this formula is correct
  逆向归纳法的含义是 如果公式正确
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  then a good way to do the computation is by working backwards from the end.
  最好从结尾处反向开始计算
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  Don't just blindly take the present value.
  不要只是一味地考虑现值
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  If you blindly take the present value all you've got is pv_0.
  如果盲目考虑现值你得到的只是pv_0
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  If I calculate by backward induction
  如果我用逆向归纳法计算
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  I start to the end and say, what would PV_T-1 be?
  从结尾开始 PV_T-1会是什么
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  That's a really simple thing.
  这是非常简单的
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  Then I can very simply find out
  然后 我可以轻易的找出