长三角产业集聚模式与城市创新——基于区位因素与溢出效应的实证研究

Industrial Agglomeration Mode of the Yangtze River Delta and Urban Innovation——An Empirical Study Based on Locational Factors and Overflow Effect

本文选取长三角地区2007—2019年数据,利用门槛模型等方法探讨了产业集聚模式与城市创新能力之间的关系,同时引入城市人口规模及城市开放水平等变量,实证考察了城市区位因素对产业集聚外部性发挥的影响,并进一步探究了产业集聚对周边城市创新能力的溢出作用。结果发现:从长三角地区总体来看,多样化的集聚模式促进了城市的创新产出,而专业化集聚模式则相反。且上述结论在经过替换变量后仍然成立。城市的人口规模呈现显著的门槛效应,多样化的集聚更适合于大城市。此外,专业化集聚水平较高的城市更易于从较高城市的开放水平中获益;邻近城市的产业专业化集聚给本城市的创新产出造成了不良影响,而多样化集聚的空间效应不明显。

Selecting the data of the Yangtze River Delta from 2007 to 2019 and using threshold model,spatial measurement and other methods to explore the relationship between industrial agglomeration mode and urban innovation capability,this paper introduces variables such as urban population size and urban openness,empirically examines the impact of urban location factors on the externality of industrial agglomeration,and further explores the spillover effect of industrial agglomeration on the innovation capability of surrounding cities.The results showed that,from the perspective of the Yangtze River Delta as a whole,diversified agglomeration models promoted the innovation output of cities,while specialized agglomeration models were the opposite.And the above conclusion still holds after replacing variables.The population size of cities presents a significant threshold effect,and diversified agglomeration is more suitable for large cities.In addition,cities with higher levels of specialization and agglomeration are more likely to benefit from the openness of higher cities;the specialized agglomeration of industries in neighboring cities has had a negative impact on the innovation output of the city,while the spatial effect of diversified agglomeration is not significant.Based on the perspective of enhancing innovation capabilities,the author provides several insights into the selection of industrial agglomeration models for various cities in the Yangtze River Delta.