来自《耶鲁大学开放课程：金融理论 第13集 第13集》

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  and the young would be given by that, okay?
  年轻人的收入将由此决定
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  And I'd have to do this, a new equation, for every t.
  所以我才要这样对每个t做一个新的公式
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  Who asked? You asked the question, so does that make sense?
  谁提问的?谁问了问题 明白了吗?
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  Student: Yes.
  明白了
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  Okay, but I have to do that for every single t,
  但我必须对每个t这么做
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  so I have an infinite number of prices and an infinite number of equations.
  我有无穷的价格和无限数量的方程
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  But then you say to yourself,
  这样的话我们想到
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  "Well, hmm, if I take the ratio of p_t over p_t-1, to = p,
  如果我把p_t除以p_t-1的比例设为p
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  then the ratio of these two prices
  那么那两个价格的比例
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  is the same as this price,"
  就同p这个价格一样了
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  And so I'll have one equation and one unknown variable,
  所以我有一个方程和一个未知数
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  and that same equation will get repeated every other generation.
  而同样的公式将得在每隔一代重复