数字技术对长江经济带城市创新能力的影响及其空间效应

The Impact of Digital Technology on Urban Innovation Capacity of the Cities in the Yangtze River Economic Belt and Its Spatial Effects

本文基于2011—2020年长江经济带108个城市的面板数据进行实证分析,研究结果表明:(1)数字技术显著提升了城市创新能力,且数字技术对城市创新能力具有边际效应递增的非线性特征;(2)数字技术对城市创新能力的影响存在区域异质性,其影响效果在下游地区作用明显,在上、中游地区有所减弱,研究通过替换解释变量和被解释变量等一系列稳健性检验后结论依旧成立;(3)数字技术存在显著为正的空间溢出效应,不仅促进了本地区的城市创新能力的提升,而且也对邻近地区的创新水平产生了实质性的影响。

The paper conducts an empirical study using the panel data of 108 cities in the Yangtze River Economic Belt from 2011 to 2020.The results of the study show that:(1)Digital technology significantly enhances urban innovation capacity,and digital technology has a non-linear characteristic of increasing marginal effect on urban innovation capacity.(2)There is regional heterogeneity in the impact of digital technology on urban innovation capacity,and its effect is obvious in the downstream region and weakened in the upstream and midstream regions.The findings remain valid after a series of robustness tests such as replacing the explanatory and explanatory variables.(3)Digital technology has a significant positive spatial spillover effect,which not only promotes the improvement of urban innovation capacity in the region,but also exerts a substantial impact on the innovation level of neighboring regions.