中文摘要：

本文利用中国营养健康调查数据库（CHNS）1988-2010年的家庭人均年收入微观调查数据,测算我国城镇与农村内部的收入不平等和收入极化指数,并通过估算历年低、中、高收入群体所占人口的比重,从另一个角度解释不同年份间收入不平等指数和收入极化指数各自变动的特点。测算结果表明农村内部的收入不平等和极化程度要高于城镇,农村各收入群体趋向于向低、高收入水平聚集,中等收入群体比重减小,而城镇各收入群体则向中等收入水平聚集。这说明城镇内部的收入分配更加合理,农村内部的收入差距还有待改善,收入调节政策所面临的问题也更加严峻。

英文摘要：

This paper uses the Chinese nutrition and health survey database （CHNS） 1988 -2010 microscopic survey data of household annual per capital income data to estimate the income inequality and income polarization index of China＇s ur- ban and rural areas. Meanwhile, the article explains the features of income inequality and income polarization index sepa- rately between different years from another point by estimating the proportion of the population share in low, medium and high income groups over the years. The results show that the degree of income inequality and polarization within rural areas is higher than that of urban areas, aggregate income of rural income groups tend to low and high levels, while the town is gathered to middle - income levels. The phenomenon indicates that the internal distribution of urban income is more reason- able, the income gap within rural areas is to be improved and the problem of adjustment is more severe.