中文摘要：

本文运用反映不同收入群体异质性的混合分布测度方法估计收入分布,对收入分布拟合效果的评判方法进行了探讨,在利用假设检验思想从收入变动角度给出一种收入群体界定标准的基础上,从规模上刻画我国收入分配格局,并运用夏普里分解规则对影响格局形成的宏观因素进行了解构。对CHNS（1989-2011）住户调查数据实证分析的结果表明,近年来城乡居民收入分布逐渐呈多峰特征且城镇更为明显;城镇和农村居民不同收入群体间的相互作用相当,低收入群体内部收入的增长可有效促进自身规模的缩小,中收入群体内部收入的增长虽同样有助于低收入群体规模的缩小但对自身群体规模变动影响不大,高收入群体内部收入的增长则将有助于自身规模的增大,而各群体内收入分配差距的扩大多会阻碍＂橄榄型＂格局的形成。

英文摘要：

This paper proposes a new measurement of income groups using fractiles of subpopulation distributions in the mixture distribution model,which fully considers the income heterogeneity.Based on the CHNS data from 1989 to 2011,it shows that income distributions are gradually taking on the features of multimodality in recent years,while urban residents＇ income has a more obvious multimodal distribution.The interactions among different income groups in rural and urban areas are roughly the same.For the low-income group,the increasing of its income level can promote the reduction of its scale;for the middle-income group,the rising of its income level can also promote the reduction of the scale of the low-income group,but cannot much affect its own scale;for the high-income group,its rising level of income can only contributed to the expansion of its own scale.However,the widening income gap in any group would hinder the formation of the ideal ＇Olive Shape＇ social structure.