中等收入及其人口比重测算方法研究

居民收入分配关系到广大民众的生活水平，分配公平程度是广泛关注的话题。其中中等收入人口比重是反映收入分配格局的重要指标，这一人口比重越大，则收入分配结构越合理，这就是橄榄型收入分配格局。文章主要是在此基础上研究更合理的中等收入及其人口比重的测算方法。目前常用的测算方法是收入空间法和人口空间法，但是这两种方法都存在缺陷，针对这两种方法做了改进，并对分布函数、符合我国的国情等因素的影响也进行了分析。

A Research on Measure of the Middle-income population

The distribution of income is relevant to the living standard, the fairness level of distribution is of wide public concern. The proportion of the middle-income population is an important index to reflect the distribution of income, more larger the proportion, more reasonable , and this is the olivary structure of income distribution. The paper proposes a more reasonable measurement of middle-income population which based on the structure. Income-space law and population-space law are common methods to measure, but with obvious flaw, which will be improved in this paper. This paper also thinks about the distribution function and the factors which affect Chinese national conditions.