ECONOMIC SPACE EVOLUTION OF YANGTZE RIVER DELTA CITY GROUP BASED ON COUNTY SCALE
利用1990-2007年长三角城市的人均GDP及增长率数据，揭示了该城市群经济空间的全局与局部演化特征，发现绝对差异扩大而相对差异不显著，上海仍为绝对中心，多极驱动格局未形成。
By applying per capita GDP and its growth rate statistics from 1990 to 2007 of the Yangtze River Delta cities,the paper reveals the economic space evolution of global and local characteristics of Yangtze River Delta city group.The results show that: there has been a significant absolute difference for the economic development of the Yangtze River Delta city group,and this trend is further exacerbated,while the relative difference is not significant correlation.Shanghai is still the absolute center of Yangtze River Delta which shows that multi-polar drive pattern has not yet formed.In addition to geographical factors,administrative factors such as the implementation of national strategies and adjustment of administrative divisions,also have significant implications on the spatial pattern in the course of the evolution of economic space.