1995—2012年国内个人收入分布函数演化研究

发布时间：2018-03-29 06:32

  本文选题：经济物理学　切入点：累积分布函数　出处：《统计与信息论坛》2016年02期

【摘要】：基于国家统计局1995 2012年个人人均年收入数据,运用数据拟合方法,研究国内绝大多数个人人均年收入的累积分布函数和概率密度函数从1995—2012年的演化过程,结果显示:累积分布函数为C(x)=Ae-(x-μ)2/2σ2,遵循高斯分布;概率密度函数为P(x)=B(x-μ)e-(x-μ)2/2σ2,概率密度函数图像的宽度随着时间的推移从1995—2012年逐步变宽,是(x-μ)因子推动概率密度函数P(x)中的e-(x-μ)2/2σ2部分,在使图像逐步变宽的同时右方出现了一个逐年加长的类似指数函数的长尾,这种图像提示从1995—2012年极少数人获取了极大数量的个人收入;进一步利用个人人均年收入的概率密度函数P(x)计算相应的Gini系数在这一时期的演化后发现,当今中国收入不公平性已很严重,各级相关部门应当从政策改革和福利分配方面有所重视。
[Abstract]:Based on the data of personal per capita income from 1995 to 2012 in the National Bureau of Statistics, this paper studies the evolution process of the cumulative distribution function and probability density function of the per capita income of the vast majority of individuals in China from 1995 to 2012 by using the data fitting method. The results show that the cumulative distribution function is 2 蟽 2, following Gao Si distribution, and the probability density function is 2 蟽 2. The width of the probability density function image gradually widens with time from 1995 to 2012. It is a part of e-mx- 渭 n / 2 蟽 2 蟽 2 in the probability density function (PX). While the image is gradually widened, a long tail of a similar exponential function is appearing on the right side, which indicates that a very small number of people obtained a great amount of personal income from 1995 to 2012; Further calculating the corresponding Gini coefficient by using the probability density function (PX) of per capita income in this period, it is found that the income inequality in China is very serious. Relevant departments at all levels should attach importance to policy reform and welfare distribution.
【作者单位】： 西安财经学院信息学院;西安财经学院商学院;
【基金】：陕西省教育厅科研计划项目《基于经济物理学对社会不公平性的经济学参数的研究》(14JK1275)
【分类号】：F124.7;F224
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本文编号：1679964