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文章在住户调查数据的基础上,根据Esteban和Ray等人的认同—疏离框架及Wolfson的两极分化研究思路,讨论了中国居民收入分布的极化现象、两极分化问题和中等收入人群比重(中位数收入0.75～1.25倍人群比重)变动的一些影响因素;并根据DER指数的分解特征,讨论了收入分布中的认同性、疏离性对DER指数及其变动的影响。根据与相关国家的比较发现中国居民收入分布具有比较严重的两极分化。城乡合并样本下的极化主要由于城镇内部基尼系数和城乡收入差距所解释;就业及经济转型对于城镇内部极化现象具有重要的解释作用。
Based on the household survey data and on the basis of Esteban and Ray’s identity-alienation frame and Wolfson’s polarization research ideas, the paper discusses the polarization of income distribution in China, polarization and the proportion of middle-income group (median And some factors influencing the changes of the index of income and income of 0.75 to 1.25 times of the population. According to the decomposition characteristics of the DER index, the effect of identity and alienation on income distribution on the DER index and its changes is discussed. According to the comparison with other countries, it is found that the income distribution of Chinese residents has a more serious polarization. The polarization under the urban-rural sample is mainly explained by the Gini coefficient in urban areas and the income gap between urban and rural areas. Employment and economic restructuring play an important role in explaining the internal polarization in urban areas.