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作 者:马兆良[1] 金劲龙 MA Zhao-liang;JIN Jin-long(School of Economics,Anhui University,Hefei 230601,China)
出 处:《兰州财经大学学报》2025年第2期68-80,共13页Journal of Lanzhou University of Finance and Economics
基 金:安徽省社会科学创新发展研究课题“数字赋能安徽制造业绿色转型的机制与路径优化研究”(2023CX029)。
摘 要:基于2011-2020年279个城市的面板数据,采用熵值法和主成分分析法构建城市层面数字经济综合发展指数体系进行测度。运用面板模型、中介效应模型和空间杜宾模型,考察数字经济对城市外贸竞争力的影响并识别传导机制。结果表明:数字经济对城市外贸竞争力有显著的正向影响;创新产出作为中介变量在数字经济赋能外贸竞争力的过程中发挥了重要作用;数字经济对城市外贸竞争力的影响有异质性特征,单独引入三类城市虚拟变量后,在东部沿海地区等数字经济水平较高的区域该影响更为显著;数字经济对邻近城市外贸竞争力影响存在显著正向的空间溢出效应。鉴于此,政府应当加快数字基础设施升级,支持数字产业创新,实施因地制宜的差异化政策,加强数字产业地区联动性,充分释放数字经济为城市外贸竞争力带来的红利。Based on panel data from 279 prefecture-level cities between 2011 and 2020,this study constructs a comprehensive city-level digital economy development index using the entropy method and principal component analysis.Utilizing panel models,mediation effect models,and spatial Durbin mod-els,the research investigates the impact of the digital economy on urban foreign trade competitiveness and identifies its transmission mechanisms.The research results indicate that the digital economy has a significant positive effect on urban foreign trade competitiveness.Innovation output,as a mediating vari-able,plays a crucial role in the process of the digital economy enhancing foreign trade competitiveness.The impact of the digital economy on urban foreign trade competitiveness exhibits heterogeneous charac-teristics,with a more pronounced effect in regions such as the eastern coastal areas,which have higher levels of digital economy development after introducing three city dummy variables.The digital economy demonstrates a significant positive spatial spillover effect on the foreign trade competitiveness of neigh-boring prefecture-level cities.Consequently,the government should expedite digital infrastructure up-grades,support digital industry innovation,implement differentiated policies tailored to local condi-tions,strengthen regional linkages in digital industries,and fully harness the dividends that the digital economy brings to urban foreign trade competitiveness.
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