如何确定效用函数

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本人博士菜鸟一枚，正在焦头烂额的建模中。现在不知道如何选择（或者构建）合适的效用函数。现在想构建的效用函数：两种产品替代关系，得出的需求函数最好比较好求消费者剩余。其中Cobb-Douglus不适用。



求高人指点：
1.如何选用合适的效用函数，或者选用时应该考虑哪些因素？
or
2. 哪些书里有比较详尽的，对不同效用函数进行比较的。我现在手里有范里安的两本书。

不是经济学出身，建模的时候捉急的很，劳烦各位了！！！！

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关键词：效用函数 消费者剩余 求高人指点 Cobb 高人指点 如何

根据经验自己定义，或者根据实际数据拟合假设。

xxx3612 发表于 2013-8-28 08:10
根据经验自己定义，或者根据实际数据拟合假设。

谢谢你的回复！ 实验数据拟合我明白，但是根据经验。。。我还是很捉急。觉得自己好像应该整个系统补一下才能获得这样的经验～～ 有没有什么提高经验的方法？谢谢！！！

you can't integrate area between CD utility function and price level to get consumer surplus, after all, CD funcition has no intercept with axis. so perhaps you may try other function, such as CES and so on. good luck!

miseschen 发表于 2013-8-28 08:40
you can't integrate area between CD utility function and price level to get consumer surplus, after  ...

Thanks for your reply!!!! It helps a lot!!

I also did not consider about CD. Since in CD function, a typical consumer spends a certain amount money on each type of products.  Now, I am considering CES...... Hope I can get good result~~

sapoten 发表于 2013-8-28 09:04
Thanks for your reply!!!! It helps a lot!!

I also did not consider about CD. Since in CD functi ...

i suggest you to see Krugman's works. He mainly bases his on specification of CES utility function.   

miseschen 发表于 2013-8-28 09:14
i suggest you to see Krugman's works. He mainly bases his on specification of CES utility function ...

Thanks!

I checked Krugman's most cited paper on google scholar just now. I read Krugman (1980) quite long before, but could not understand very well. But, I do not mind reading it again. The other is Krugman 1990. would you think it is a good choice to read these two papers? Or, would you please give me some other recommendation?

Thanks in advance!!

sapoten 发表于 2013-8-28 10:08
Thanks!

I checked Krugman's most cited paper on google scholar just now. I read Krugman (1980) ...

maybe you could read Dixit-Stiglitz model (original version published in 1977 AER) and its offspring Krugman's CP model (original version published in 1991 JPE), these two models are adapted in Fujita, Krugman and Venables' Spatial Economy's Ch. 4 1nd 5, i think they are easier to be found and read.

miseschen 发表于 2013-8-28 11:07
maybe you could read Dixit-Stiglitz model (original version published in 1977 AER) and its offspri ...

Thanks so much!! Sorry for my late reply as well! I will check and read later~~~ Nice day!!!!

sapoten 发表于 2013-8-28 08:15
谢谢你的回复！ 实验数据拟合我明白，但是根据经验。。。我还是很捉急。觉得自己好像应该整个系统补一下才 ...

多读一些关于效用的文献 看看别人都是怎么定义的 就好了