基于不同效用函数的购买力平价计算方法与应用  

The calculating method of purchasing power parity based on different utility function and its applications

作　　者：张研[1] 夏国平[1] 

机构地区：[1]北京航空航天大学经济管理学院,北京100083

出　　处：《系统工程理论与实践》2008年第4期113-117,共5页Systems Engineering-Theory & Practice

基　　金：国家自然科学基金(70671007)

摘　　要：从效用最大法则推导不同的购买力平价计算公式.结论是:当在不同国家效用函数不同时,理论上不可能计算购买力平价,但给出相同的"一篮子"产品规定后,可以给出相应计算公式.文中从Leontief类型效用函数出发,解释了当前普遍采用的线性加权法的经济学原理,本文还给出了基于Cobb-Douglas效用函数的对数线性加权购买力平价计算公式.There are a lot of important applications of PPP （Purchasing Power Parity） in practice. One usually uses the linear weighted method to calculate PPP in practice. In this paper the equations used to calculate PPP arc deduced by the maximum utility law. The major conclusion of this paper is that it is impossible to calculate PPP theoretically when different countries don＇t have the same utility function. But as soon as the definition of package products is given, it is possible to give the equations used to calculate PPP. And one can understand the economic principle of the linear weighted method of PPP well by using the Leontief utility function. On the other hand, the logarithm linear weighted method for calculating PPP is given by using the Cobb-Donglas utility function.

关 键 词：购买力平价 线性加权 对数线性加权 效用函数 

分 类 号：F014[经济管理—政治经济学]