关键词: 基尼系数, 区间估计, 收入份额法, 回归系数法, 抽样分布法

Abstract: This paper promotes several new approaches for computing Gini index based on discrete distribution. The discrete form of covariance that computes Gini index is derived from the income share method, and it leads to the regressive coefficient method, whist sample estimation of Gini index and statistical inference is discussed in two ways. The new approaches can also be applied to analyze the concentration index; they will have a wide use to measure inequality in the socioeconomic field. It is confirmed that the new approaches are effective to simply estimating standard deviation in internal estimation of Gini index.

Key words: Gini Index, Interval Estimation, Income Share method, Regressive Coefficient Method, Sample Distribution Method