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在厘清中等收入者的概念和国内外度量方法的基础上,参考中产阶层的定义,提出中等收入者的新定义和度量中等收入者的EGR法。运用中国营养与健康调查数据,对已有方法和EGR3法度量的结果比较后发现:由于缺乏理论基础,中位数收入法对收入区间的设定异常敏感,绝对门限值法又无法识别收入分布的内在变动;内生界定法相对严谨,但依赖于居民收入分布函数的选择。采用中产阶层的特征因素对不同方法进行同质-异质性检验进一步表明EGR3法在我国具有较强的适用性。
On the basis of clarifying the concept of medium-income earners and the methods of measuring at home and abroad, a new definition of middle-income earners and an EGR method of measuring middle-income earners are proposed with reference to the definition of the middle class. Using the data from the China Nutrition and Health Survey, comparing the results of the existing methods with those of the EGR3 method, we find that due to lack of theoretical foundation, the median income method is exceptionally sensitive to the setting of the income range and the absolute threshold method can not identify the income Distribution of internal changes; Endogenous definition of a relatively rigorous, but dependent on the choice of income distribution function of residents. The homogeneity-heterogeneity test of different methods using the characteristic factors of the middle class further shows that the EGR3 method has strong applicability in our country.