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主题:【原创】西方经济学是瘸腿的经济学 -- 思想的行者

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家园 a lot of misunderstandings

1.

当人喝的水还没有达到实际所需要的量的时候,这个时候人所获得的满意度难以判断是第一口水还是第二口水还是第几口水

You confuse total utility with marginal utility. Total utility includes but doesn't differentiate first or second monthful. The satisfaction you get from each mouthfull is the marginal utility, which, in this case, is very intuitive.

2.

当你喝的水达到了定量---即需求的极限值的时候,你喝更多的水产生的效果是负数,而不是边际效用递减所说的下降(边际效用递减没有说明下降到哪个极值----至少从数学分析的角度来看是很不严密的)

Marginal utility turns to negative first then followed by total utility as quantity increases.

Min/max is not necessary because they differ among cases.

Your don't seem to know much about econ, don't waste your time.

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