区域一体化与县域经济发展活力--基于长三角扩容的准自然实验

Regional Integration and County Economic Development Vitality:A Quasi-natural Experiment Based on the Expansion of the Yangtze River Delta

县域经济是区域发展的基石,县域活则全盘活。文章基于2005—2020年长三角地区153个县域单元面板数据,以长三角城市经济协调会扩容为契机,结合渐进双重差分法、合成双重差分法,实证检验区域一体化对县域经济发展活力的影响及作用机制。研究发现:区域一体化显著促进了县域经济发展活力提升,这一促进作用主要依赖于经济联系机制、产业结构升级机制以及市场活力机制的有效发挥;区域一体化对县域经济发展活力的政策效应,因地区差异、行政约束、工业基础等因素不同而有所不同。在加快构建新发展格局背景下,应更加重视县域经济基础性地位,进一步深化体制机制改革和制度创新设计,有效排除区域内要素自由流通障碍,并引导地方政府强化一体化协同发展理念,充分激发县域经济发展活力。

The county economy is the cornerstone of regional development,and it is vital to the overall development.Based on the panel data of 153 counties in the Yangtze River Delta from 2005 to 2020,this article takes the expansion of the Yangtze River Delta Urban Economic Coordination Association as an opportunity,and uses the methods of the staggered difference-in-differences and synthetic difference-in-differences to empirically test the impact of regional integration on county economic development vitality.The study finds that regional integration has significantly promoted the vitality of county economic development,and this promotion mainly depends on the effective play of economic linkage mechanism,industrial structure upgrading mechanism and market vitality mechanism.The policy effect of regional integration on the vitality of county economic development varies with regional differences,administrative constraints,industrial base and other factors.Under the new development pattern,we should pay more attention to the basic status of the county economy,further deepen the reform of the mechanism and system and the innovative design of the system,effectively reduce the obstacles to the free circulation of factors in the region,and guide local governments to establish the concept of integrated and coordinated development,so as to fully stimulate the vitality of county economic development.