Economic Development Disparities and Spatial Pattern Evolution in Bohai Sea Economic Zone
用基尼系数、泰尔指数等方法分析环渤海44个城市的经济差异，发现总体差距在扩大，河北省是缩小区域差距的关键。
From the angle of temporal dimension and spatial perspective,using the Gini coefficient,Theil index,coefficient of variation,and the space center Statistics act,regional separation coefficient method,taking GDP and population as variable indicators to measure regional economic disparity,this study chose 44 cities of the economic circle around Bohai Sea to make the quantitative analysis of the development of differences in the evolution of trends.The results showed:(1) the tendency of overall disparity in the economic circle around Bohai Sea is expanding.The income of the secondary and tertiary industries had greater effect the overall disparity.The geographic centralization effect of the industry is greater than the structure effect;(2) The departure of the economic center depended on level of economic development in the Liaoning economic zone to,while Hebei and Shandong economic Zone pulled the population center towards southwest;(3) disparity development within the zone was the main reason for the expansion of regional disparity,especially the disparity development of Hebei economic zone,The separation index within the zone presented a U shaped structure and the turning appeared in 2008.The results show that to promote Hebei area is the main focus of the development of Bohai Sea Economic Zone,and is also the key to realize the balance development of regional economy.