Evaluation and Spatial Differences of Specialized Market Development in Yangtze River Delta
采用主成分分析、不平衡指数和空间自相关等方法，评估长三角专业市场发展指数并分析其空间差异，发现空间差异显著且略有扩大，集聚趋势随时间减弱，私营工业、居民收入、交通和开放度是主要影响因素。
The development of specialized market activates the circulation of commodities, promotes the prosperity of economics and becomes an important part of the development of China's economy. The study of specialized market development's spatial differences is helpful to make clear the features and rules of regional economic development. In the beginning, the authors adopt the global principle component analysis method to calculate the development index of specialized market and divide them into three types. Then they use imbalance index and spatial autocorrelation analysis method to analyze the spatial differences of specialized market development. The results show that spatial difference of the specialized market development in Yangtze River Delta is remarkable and has a tendency of slight expansion; the development of the specialized market shows an obvious spatial autocorrelation in 2004, that is, the development of the specialized market manifest a trend of similar agglomeration. But with over time, spatial autocorrelation weakened. In2004, HH type concentrated in the central and southern areas of the Yangtze River Delta, while the LL type areas were mainly located in the north wing of the Yangtze River Delta. But by 2011, the spatial agglomeration trends weakened. At last, through the analysis of OLS and SEM model, they find the developmental level of private industrial enterprises, the disposable income of urban residents, the traffic condition and the degree of opening- up play important poles in the spatial differences of specialized market development. The model also shows that, the spatial scale of cities and the spatial interactions of cities have an impact on the development of specialized markets in Yangtze River Delta.