Consider the Gini coefficient, the most common measure of inequality, which runs from a value of zero for perfect equality to 100 for perfect inequality (one person receives all the income). The average Gini score (not weighted by population) in countries for which there are data declined slightly in the 2000-2010 period, from 39 to 38.
首先，卢斯蒂格在一篇最新文章中指出，世界收入不平等没有在上升。以最常用的额不平等性衡量指标——基尼系数为例。基尼系数位于0到100之间，0代表完全平等，100代表完全不平等（所有收入都归一人所有）。有数据国家的平均基尼系数（未经人口加权）在2000—2010年间略微下降，从39降到了38。