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本文从Hamilton-Costa方法和广义Fechner-Thurstone(GFT)直接效用函数出发,利用中国2000-2013年城镇居民家庭数据,分别估计居民常偏好结构和可变偏好结构下的真实生活成本指数和CPI偏差,并比较了两种方法结果的差异。结果表明,CPI高估和低估的真实生活成本指数的年份几乎交替出现,使得累计CPI相当准确地反映了累计真实生活成本指数,2000-2013年的累计CPI偏差为0.81%。最后就可行性建议有关部门在发布CPI的同时,可考虑也计算和发布GFT指数,以作参考。
Based on the Hamilton-Costa method and generalized Fechner-Thurstone (GFT) direct utility function, this paper estimates the real cost-of-living index and CPI deviation under the household preference structure and the variable preference structure using urban household data from 2000 to 2013 in China , And compared the difference between the two methods. The results show that the years of real cost of living index of overvalued and underestimated CPI are almost alternated, so that the cumulative CPI reflects the true real cost of living index fairly accurately. The cumulative CPI deviation from 2000 to 2013 is 0.81%. Finally, the feasibility of the relevant departments in the release of the CPI at the same time, consider also calculate and release GFT index, for reference.