来自《耶鲁大学开放课程：博弈论 第7集 第7集》

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  So if she consumes from Firm 2 she has to walk 1 -Y.
  如果她想去公司2消费则她要走1-Y
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  That's going to turn out to be key in our model
  这是此模型的关键
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  as we'll see in a second.
  我们马上能见到
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  So firms, as before,
  这些公司 像之前一样
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  are going to set prices.
  将设定价格
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  I won't write everything down because it's all written down
  我不全写在这了因为它们都在
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  on the homework assignment which is already on the web,
  网上的家庭作业任务中写了
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  but in fact firms are going to maximize profits,
  实际上公司是希望利润最大化
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  aim to maximize profits,
  目的是利润最大化
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  firms are going to have constant marginal costs.
  公司有固定的边际成本
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  We'll make one other assumption to keep life simple.
  为了更简单点我们将设定另一个假设
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  We'll assume that each consumer buys one and only one product.
  我们假设每个消费着买且只买一个产品