OALib Journal期刊
ISSN: 2333-9721
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基于边际K函数的长三角地区城市群经济空间划分
DOI: 10.11821/dlxb201504002, PP. 528-538
Keywords: 经济空间划分,Ripley's,K函数,边际分析法,城市群,长江三角洲地区
Abstract:
基于空间点模式分析的Ripley'sK函数,结合微观经济学的边际分析法,通过集聚度和边际集聚两个指标,从理论上探索城市群集聚效应的定量测度方法,提出一种城市群的经济空间划分方法。本文的不同在于,多尺度估算城市的集聚度和边际集聚,以城市的边际集聚极值点时的城市区域布局模式为最优,据此划分城市群的经济空间,并以长江三角洲地区为例,对本文提出的方法进行实证。研究结果表明①城市的集聚度估计显示,长三角地区2010年城市空间布局为随机分布型,但随着观测尺度的增加,城市的集聚度呈快速上升趋势。②边际集聚估计揭示,当城市区位和城市规模的集聚尺度分别为173km和185km时,城市区位或规模的集聚效应达到峰值,此时长三角地区城市空间布局出现最优模式。③空间聚类分析展示,在城市区域布局的最优空间模式下,长三角地区呈现“中心—外围”的经济空间结构,高集聚度子群是区域经济发展中心,全部位于上海经济辐射圈,而低集聚度子群是外围欠发达地区,全部位于区际行政边界,暗示边际负效应仍阻碍着地区内外人员的往来。
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