如果1980年到2007年全球GDP的增长速度能保持1950年到1973年的增长水平，全球人均GDP将会比现在增加20 % — —这还不排除中国的因素,因为中国在过去20年一直保持着较高的增长率。
The average world citizen would have been 20% richer had world GDP per capita grown at the same rate between 1980 and 2007 as it did between 1950 and 1973 – and this despite China’s high growth rates in the past 20 years.