来自《耶鲁大学开放课程：博弈论 第19集 第19集》

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  the first thing you want to do is what?
  你首先要干什么
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  You want to look at the sub-game.
  你要先分析子博弈
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  You want to look at what would happen if you did invest
  你要先考虑如果你投资了会怎样
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  and solve out the new Nash equilibrium in that sub-game.
  然后求出子博弈的纳什均衡
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  Then you want to roll back the value of that sub-game
  之后再从这个子博弈的价值出发
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  back into the initial decision which is the strategic investment decision
  回过头来作出决定
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  whether to rent this machine or not.
  到底应不应该租用该设备
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  So schematically, the game looks like this: rent or not rent,
  如图所示 这个博弈是这样的 租不租
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  and in either case you play Cournot.
  每种情况你们都要进行古诺竞争
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  There's a sub-game in each case.
  每种情况都有一个子博弈
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  In this case you play symmetric Cournot,
  这种情况你是进行对称古诺竞争
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  when you both have the same costs;
  此时成本是相同的