基尼系数测度贫富差距的一种改进方法OA北大核心CHSSCDCSTPCD

The Gini coefficient is an important indicator to measure the gap between the rich and the poor,but the construc-tion of the Lorenz curve makes the Gini coefficient have structural limitations,that is,two Lorenz curves representing different gaps between the rich and the poor may correspond to the same Gini coefficient.The Gini coefficient alone cannot reflect the struc-tural characteristics of the gap between the rich and the poor.The raised viewpoint is as follows:The point on the Lorenz curve with a tangent slope of 1 is called the average growth point.Each Lorenz curve has only one average growth point.The tangent slope of the Lorenz curve is monotonic.By introducing the average growth point,the gap between the rich and the poor can be mea-sured jointly with the Gini coefficient to break through the structural limitations of solely relying on the Gini coefficient to measure the gap between the rich and the poor.