But there is surprisingly deep inequality in firms’ productivity, which means that the size of the pie varies radically. This is especially true in developing countries, where it is common to find differences in productivity of a factor of ten at the provincial or state level and many times higher at the municipal level.
区分企业之间的生产率不平等和企业内部的收入分配不平等至关重要。传统的劳资之争是关于后者的，是工人和所有者之间争夺馅饼。但企业生产率之间也存在大得惊人的不平等，这意味着馅饼的大小区别迥异。特别是一些发展中国家，省际和州际生产率差距达到十倍以上稀松平常，市际差距更是极其巨大。