Convergence and Divergence of Regional Income Distributions and Welfare
分析1970年代美国主要区域（西部、中西部、东北部、南部）的收入分布，发现非南部主要区域在1969年收入分布等价，而南部处于劣势；1970年代后，西部优于中西部，中西部优于南部，南部优于东北部。
Regional income distributions are analyzed and tested for convergence and divergence in the 1970s. The methodology is the same as that recently used to show the almost complete convergence of the South and non-South. This paper disaggregates the non-South into major regions consisting of the West, Midwest, and Northeast. Tests for rank dominance reveal surprising results. Income distributions in the major regions of the non-South were equivalent in 1969, and the South was uniformly dominated. Fundamental changes in the 1970s resulted in the West rank dominating the Midwest, which dominated the South, which in turn dominated the Northeast. Copyright 1994 by MIT Press.