来自《耶鲁大学开放课程：金融理论 第3集 第3集》

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  them all,but they're differently
  他们的观点 但是他们的观点
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  presented than this course and that's why you need to rely on
  和本书观点有一些分歧 所以你们需要借助
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  the notes a little bit.
  笔记才能搞懂
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  So let's just take this first example.
  现在我们来看第一个例子
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  Suppose now that we have two goods, but they're going to be continuous.
  假设我们现在有两件商品
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  You don't have to have just one football ticket or two football
  你不必只持有一两张
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  tickets.
  足球票
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  We have two goods which we're going to call X and Y,
  我们将这两种商品称作X和Y
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  and we've got two agents, A & B.
  两个代理商为A和B
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  And so W^(A) of X and Y,that's the welfare function
  那么 W^(A)( X,Y)就是福利函数
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  like we had before,is going to be whatever I had,
  正如我前面提到的那样
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  100X - 1 half X squared Y.
  等于100X-1/2X^(X)+Y