基于引力模型与0-1规划模型的省域经济区划——以江苏省为例

ON ECONOMIC REGIONALIZATION IN PROVINCIAL SCOPE BASED ON THE GRAVITY MODEL AND 0-1 PROGRAMMING MODEL——A CASE STUDY OF JIANGSU PROVINCE

借助2008年统计数据,采用主成分法得到江苏各地级城市综合质量指数值;根据运输的时间成本与货币成本,计算江苏地级城市间经济距离;运用引力修正模型计算江苏地级城市间相互引力,并结合0-1规划模型划分经济区;依据经济区内县域间三次产业结构差异度与位置邻近性,划分经济亚区。研究表明:①江苏省可分为宁镇扬泰、苏锡常通、徐连宿、淮盐等4大经济区和15个经济亚区。②各城市连接的地区个数遵循Zipf定律,作为一、二级节点的南京和苏州统领全省经济空间网络,而南通、宿迁、盐城没有显著的联系对象。③江苏经济区空间分布逐渐由南北向格局转为南部呈东西向、北部呈南北向的格局。④各经济区内城市间的引力相差悬殊,南部较大,北部较小。省域尺度的经济区划,可为我国将来划分标准经济区奠定基础,也可为优化全省劳动地域分工格局提供依据。

Based on the statistic data in 2008,the synthetic quality index values of prefectural-level cities in Jiangsu are attained by the principal component method.By time cost and monetary cost of expressway and railway,economic distances between prefectural-level cities in Jiangsu are calculated.This paper adjusted the gravity model,calculated the interaction forces between prefectural-level cities and divided Jiangsu into several economic regions by combining with the 0-1 programming model.By the difference degree of industrial structure between counties and the neighbor-hood of position,this paper divided each economic region into several sub-economic regions.The results show as follows：（1）Jiangsu province is divided into four economic regions that are Ning-zhen-yang-tai economic region,Su-xi-chang-tong economic region,Xu-lian-su economic region and Huai-yan economic region and fifteen sub-economic regions.（2）The number of the regions linked to each prefectural-level city follows the Zipf rule,and the whole economic spatial network of Jiangsu province is led by Nanjing that is the first level knot and by Suzhou that is the second level knot,but Nantong,Suqian and Yancheng have no apparently linked region.（3）The spatial structure of Jiangsu＇s economic regions is transforming from the south-north trend into the east-west trend in southern region of Jiangsu and the south-north trend in northern region of Jiangsu.（4）The interaction forces between cities in economic regions in southern region of Jiangsu are major,but ones in northern region of Jiangsu are minor.The economic regionalization in provincial scope is a foundation of the division of standard economic region in China in the future and a favour to better optimizing the structure of Jiangsu＇s division of labor.