中心城市科技创新对城市群产业结构的影响

The impact of technological innovation in central cities on the industrial structure of urban agglomerations

研究基于演化经济地理学,由微观企业、中观产业、宏观区域三个维度对中心城市科技创新与城市群产业结构的关系展开理论机制分析。在此基础上,研究通过非线性固定效应模型考察中心城市科技创新与城市群产业结构高度化的U型关系,进一步创新性地使用历史维度工具变量(中国历史官员量化数据、中国古代城市城墙数据)对中心城市科技创新展开内生性检验识别,再运用门槛效应、中介效应模型对中心城市科技创新的结构变化点、产业分工布局影响机制进行探寻。研究发现:第一,中心城市科技创新对城市群产业结构高度化呈现U型作用,当中心城市科技创新发明专利申请数量超过13586项,会对城市群产业结构优化升级起到正向推动作用。第二,中心城市科技创新对城市群产业分工布局的专业化、相关多样化起到促进作用,对产业的无关多样化起到抑制作用,中心城市科技创新以科技创新资本、劳动力资源为主要路径对产业分工布局形成推动作用。

The research is based on evolutionary economic geography,and analyzes the theoretical mechanism of the relationship between technological innovation in central cities and the industrial structure and division of labor in urban agglomerations from the three dimensions of micro-enterprises,meso-level industries,and macro-regions.On this basis,the study examines the U-shaped relationship between technological innovation in central cities and the advanced industrial structure of urban agglomerations through a nonlinear fixed effect model,and further innovatively uses historical dimension instrumental variables(quantified data from Chinese historical officials,data from ancient Chinese city walls)Carry out the endogenous test and identification of the technological innovation of the central city,and then use the threshold effect and the intermediary effect model to explore the structural change points of the technological innovation of the central city and the influence mechanism of the industrial division of labor.The study found:First,the technological innovation of central cities presents a U-shaped effect on the advancement of the industrial structure of urban agglomerations.When the number of patent applications for technological innovation in central cities exceeds 14,555,it will play a positive role in the optimization and upgrading of the industrial structure of urban agglomerations.Second,the technological innovation of the central city promotes the specialization and related diversification of the industrial layout of the urban agglomeration,and inhibits the irrelevant diversification of the industry.The technological innovation capital and labor resources of the central city take the technological innovation capital and labor resources as the main path to promote the division of labor in the industrial layout.