测算洛仑兹曲线方程及基尼系数的新方法

一个国家（或地区）的人口可以按照收入从低到高分成若干等级．分析了收入分布所具有的特征，典型例子的分析表明，如下的假定有一定道理，即随着等级的提高，人数呈指数递减，收入却呈指数增加；依上述假定推导出洛仑兹曲线的数学表达式及基尼系数的计算公式；将这些理论应用于中国的收入差距分析，并给出了这种方法的应用前景．

New measure method of Lorenz curve expression and Gini coefficient

The population of a nation or an area can be classified into several groups according to the amount of income. The character of income distribution is analyzed. Basically, it is found that, with the increase in grades, level of population in each grade decreases by exponent while amount of income rises by exponent. Based on this character of income distribution, Lorenz curve expression and Gini coefficient formula are deduced. Income gap in China is analyzed, and the application perspective of the new measure method is presented.