Gini coefficient and 90/50 deciil ratio of household per capita assets

Definition: The Gini coefficient is a measure of relative concentration or inequality, here in terms of per capita assets, and can assume a value between zero (equal distribution) and one (maximum concentration). It is based on the Lorenz curve, which — for example in the case of a distribution of assets — from the poorest households represents the accumulated shares in the number of households in relation to the total share of their total assets. With an absolutely even distribution of assets, the Lorenz curve would result in a straight up with 45 degrees (line of perfect equal distribution). The deviation of the actual curve from this ideal line is measured by the Gini coefficient. In the case of equal distribution, there is a value of zero for the Gini coefficient and, in the case of concentration of the total assets on only one person, a value of 1. An increase in the Gini coefficient thus means an increase in the U.S.定义：基尼系数（Gini coefficient）是衡量相对集中程度或不平等程度的指标，本次针对人均资产维度进行计算，其取值范围介于0（完全均等分配）与1（完全集中）之间。该指标基于洛伦兹曲线（Lorenz curve）：以资产分配场景为例，洛伦兹曲线从最贫困家庭出发，展示按家庭户数累计的占比与其总资产总占比的对应关系。当资产实现绝对均等分配时，洛伦兹曲线将呈现为一条45度直线，即完全均等分配线。实际曲线与该理想直线的偏离程度由基尼系数量化。在资产完全均等分配的情况下，基尼系数取值为0；若全部资产仅集中于单一主体，则基尼系数为1。因此，基尼系数的提升意味着不平等程度加剧。