长三角城市群经济地理特征与市场一体化影响因素研究--基于“3D+T”框架的分析

A Study on Economic Geographical Characteristics and Influencing Factors of Market Integration of Urban Agglomeration in Yangtze River Delta:Based on“3D+T”Framework

以长三角城市群27个城市为研究对象,基于拓展的新经济地理学“3D+T”框架理论,分析城市群经济地理演变特征,并运用固定效应空间自回归模型实证分析了2010—2019年区域市场一体化影响因素空间效应问题。结果表明:(1)城市群“3D+T”特征演化表明,高密度、高技术的城市主要集中在上海、杭州、南京等核心城市及其周边城市,而远距离、高分割的城市主要集中在边缘地区,呈现出“极点”和“洼地”现象。(2)长三角城市群市场一体化空间效应不明显,而密度、距离、分割与技术因素空间效应显著。(3)密度因素对市场一体化的影响为负但不显著,而技术因素对市场一体化的影响为正但不显著;距离因素显著地促进市场一体化水平提升,而分割因素对市场一体化产生了显著的负向影响。最后,根据实证结果分析提出建议,以促进长三角城市群市场一体化高质量发展。

Using 27 cities in the Yangtze River Delta urban agglomeration as samples,this paper uses the expanded“3D+T”framework theory of new economic geography,discussing the economic and geographical evolution characteristics of urban agglomeration,and empirically analyzes the spatial effect of the influencing factors of regional market integration from 2010 to 2019 by using the fixed effect spatial autoregressive model.The results show that:(1)the evolution of“3D+T”characteristics of urban agglomeration shows that high-density and high-tech cities are mainly concentrated in core cities such as Shanghai,Hangzhou,and Nanjing,and their surrounding cities while long-distance and highly segmented cities are mainly concentrated in marginal areas,showing the phenomenon of“pole”and“depression”.(2)The spatial effect of market integration of urban agglomeration in the Yangtze River Delta is not significant,but the spatial effect of density distance segmentation and technical factors is significant.(3)The influence of density factor on market integration is negative but not significant,while the influence of technology factor on market integration is positive but not significant;Distance factor markedly boosts the standard of market integration,while segmentation factor has a remarkable reverse impact on market integration.Finally on the basis of the analysis of empirical results,some suggestions are put forward to advance the high-quality development of market integration of urban agglomeration in the Yangtze River Delta.