By contrast, countries that had increased their education from 2.8 years of schooling in 1960 to 8.3 years of schooling in 2010 were only 167% richer. Moreover, much of this increase cannot possibly be attributed to education, as workers in 2010 had the advantage of technologies that were 50 years more advanced than those in 1960.
1960年，学校教育达8.3年的国家比只有2.8年的国家富5.5倍。相比之下，1960年只有2.8年而到2010年增加到8.3年的国家却只富167%。此外，即便上述增长也在很大程度上并非归功于教育，因为2010年的工人拥有比1960年工人先进50年的技术优势。显然，繁荣除了教育还需要别的东西。