Research by Peter Lindert and Jeffrey Williamson shows that on the eve of the American Revolution incomes in the 13 colonies that formed the United States were more equal than in virtually " any other place on the planet ". 彼得林和杰弗里威廉姆森的研究表明在美国独立战争前夕,组成美利坚合众国的十三个殖民地的收入实际上比“地球上的其他地方”都要更均衡。