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城市群与产业集聚在本质上都属于集聚经济,在空间发展上两者具有高度的耦合性。本文在理论上拓展了Fujita&Thisse模型,得出了城市群内产业集聚与经济增长存在一种共生关系,呈非线性关系的结论性命题;在实证分析上,选择了长三角25个设区市1998—2010年的制造业面板数据为样本,通过对产业集聚与经济增长的动态面板GMM回归,检验了上述命题,并得出城市群内产业集聚与经济增长关系表现为一种倒U型曲线关系的结论。这一结论对我国城市群内的产业集聚区规划具有重要政策启示:产业集聚具有正、负外部性,政府对城市群内集聚区的规划应合理把握集聚的度,应加强集聚区间分工和基础设施建设以降低集聚增加带来的负外部性。
Both urban agglomeration and industrial agglomeration belong to agglomeration economy in essence, and they have a high degree of coupling in spatial development. This paper expands the Fujita & Thisse model theoretically, and concludes that there is a symbiotic relationship between industrial agglomeration and economic growth in urban agglomeration, which is the conclusive proposition of non-linear relations. In the empirical analysis, we choose 25 districts and districts in the Yangtze River Delta - 2010 manufacturing panel data as a sample, through the dynamic panel GMM regression of industrial agglomeration and economic growth test the above proposition, and draw the conclusion that the relationship between industrial agglomeration and economic growth in an urban agglomeration is an inverted U-shaped curve Conclusion. This conclusion has important policy implications for the planning of industrial clusters in China’s urban agglomeration: industrial agglomeration has positive and negative externalities, and the government should reasonably grasp the degree of agglomeration in the planning of agglomeration areas in urban agglomerations. Therefore, the division of labor and basis for agglomeration should be strengthened Facilities to reduce the negative externalities caused by increased concentration.