translation.en: There is a recent study by Saez and Zucman showing, with new data which I didn't have at the time of the book, that wealth concentration in the U.S. has risen even more than what I report.
translation.zh: 最近经济学家伊曼纽尔·赛斯和加布里埃尔·祖克曼 用我写书时没有的新数据 表明， 美国的财富不平等加剧 比我写的还要严重。