|執筆者||Hiroshi Sakamoto, Jin Fan|
This paper applies the distribution dynamics method to study the per capita income disparity from 1990 to 2005 among the 75 cities and counties in the Yangtze River Delta (YRD). The main conclusions are as follows: First, the distribution of per capita income across YRD has changed from bi-modal to being positively skewed over the period 1990–2005; the income disparity has been reduced in the 8th Five-Year Plan, enlarged in the 9th Five-Year Plan and then reduced again somewhat in the 10th Five-Year Plan. Second, the main contribution to disparity comes from the intra disparity of the Jiangsu region; especially, the distribution density of Jiangsu is bi-modal over the period. Third, the rich cities and the poor cities developed independently and steadily at different speeds. Fourth, the cause of the convergence in the YRD is the decline of the rich cities and not the poor cities’ progress. In the end, there is relative independence in the region’s development, but long-term the YRD shows the weaker trend of convergence.