港城共生政策环境对经济高质量发展的促进--来自天津市的证据

The Promotion of the Policy Environment of Port-City Symbiosis to High-Quality Economic Development:Evidence from Tianjin

在港口城市向经济高质量发展转型的背景下,港城共生政策环境为经济社会赋能的重要性日益凸显。文章采用2005—2019年天津自由贸易港政策文本与经验数据,结合经典政策量化体系与天津自由贸易港政策特点,构建了天津自由贸易港政策量化评价体系,对港城共生政策环境进行量化评价,利用VAR模型实证考察了港城共生政策环境与城市经济高质量发展的关系。研究发现,港城共生政策环境促进了经济高质量发展,两者之间存在动态互促的演化关系;港城共生政策环境对经济发展的正向脉冲响应具有时滞效应,但经济发展对政策环境的脉冲响应平稳;港城共生政策环境对经济发展的贡献率呈现先递增后递减的倒“U”形趋势。上述发现为认识港城共生政策环境与经济发展之间的关系,以及设计并完善在港城共生条件下的城市经济高质量发展政策提供了新的思路和经验证据。

In the context of port cities transitioning to high-quality economic development,the importance of symbiotic port-city policy environments for economic and social empowerment is becoming increasingly evident.This study uses policy texts and empirical data from the Tianjin Free Trade Port from 2005 to 2019.Combining the classic policy quantification system with the characteristics of Tianjin Free Trade Port policies,a quantitative evaluation system for Tianjin Free Trade Port policies was constructed.The symbiotic port-city policy environment was quantitatively evaluated,and the VAR model was used for empirical research into the relationship between the symbiotic port-city policy environment and high-quality urban economic development.The study found that the symbiotic port-city policy environment promotes high-quality economic development,and there is a dynamic mutual promotion relationship between the two.The positive impulse response of the symbiotic port-city policy environment to economic development has a time lag effect,but the economic development's impulse response to the policy environment is stable.The contribution rate of the symbiotic port-city policy environment to economic development shows an inverted"U"trend,increasing first and then decreasing.These findings provide new insights and empirical evidence for understanding the relationship between the symbiotic port-city policy environment and economic development,and for designing and improving policies for high-quality urban economic development under symbioticport-cityconditions.