Global Earnings Inequality, 1970–2018
利用68个发达国家和发展中国家1970-2018年的新数据库，研究发现全球收入不平等在2000年代和2010年代显著下降，全球基尼系数下降15点，最贫困一半人口的收入份额翻倍，主要驱动力是实际工资增长。
Abstract We estimate trends in global earnings dispersion across occupational groups by constructing a new database that covers 68 developed and developing countries between 1970 and 2018. Our main finding is that global earnings inequality has fallen, primarily during the 2000s and 2010s, when the global Gini coefficient dropped by 15 points and the earnings share of the world's poorest half doubled. Decomposition analyses show earnings convergence between countries and within occupations, while within-country earnings inequality has increased. Moreover, the falling global inequality trend was driven mainly by real wage growth, rather than changes in hours worked, taxes or occupational employment.