收入增长和收入分配对中等收入者比重变化的影响

The Impact of Income Growth and Income Distribution on Changing Weights of Middle-Level Income Group in China

消除价格变动,以绝对标准衡量的中等收入者比重变化主要受收入增长效应和收入分配效应两个因素的影响。通过分析各自的影响机理发现,收入增长并不必然会引起中等收入者比重上升,收入差距扩大也不一定会引起中等收入者比重缩小,两种效应对比重变化的影响方向决定于中等收入者划分标准在居民收入密度曲线上的位置。本文选用相关划分标准,以对数正态分布拟合我国城乡居民收入密度曲线,初步验证了以上结论,并实证分析了20多年来两种效应对我国城乡中等收入者比重变化影响的方向和程度。

According to constant price and an absolute standard, Changing weights of middle-level income group （MLIG） determined mainly by income growth effect and income distribution effect, By analyzing the impact mechanism of two effects found that income growth will not necessarily lead to increased proportion of MLIG, the widening income gap will not necessarily lead to reduced proportion of MLIG, the direction and degree of two effects affection depends on the medium income division standard＇ s position on the income density curve. In this paper, the author uses the lognormal distribution to fit Chinese residents＇ income data and confirm above conclusions.