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太黑来科普 之 银行为何拿钱多

发信人: litaihei (李太黑), 信区: Quant
标  题: 太黑来科普 之 银行为何拿钱多
发信站: BBS 未名空间站 (Fri Oct  3 22:23:16 2008)

现在满大街的评论家，都在大骂花街贪婪，都说银行不从事生产，凭什么拿这么多钱。
新的救市计划，还有限制银行奖金的条款。那么，银行拿多钱，到底和不合理呢？

让我们建立一个小模型。假设有一家银行和n个工厂。银行自己不能产生收益。假设工
厂离了银行，也不能产生收益。但是银行和一个工厂合作，能够产生一块钱的收益。那
么当银行和n个工厂合作，产生出来n块钱，银行和工厂之间，应该如何分配这n块钱呢？

在满足一定条件的前提下，银行拿n/2块钱，工厂那1/2块钱，是最为合理的分配方式。

为什么这样呢？因为银行的存在，要比单个工厂的存在更为重要，银行没了，大家都没
钱赚。那么能不能银行少拿点，工厂多拿些呢？当然可以，但这不是最优解，在社会的
发展之中，自然会回归到最优解。

中国足协经常拍脑门作决定，现在看来，fed也差不多啊。听说大本还是教授什么的。
。。


--
当一切都无可挽回的沦为真实，我的故事就要结束了。
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