数字经济发展与高端制造业绿色创新效率——基于空间溢出与门槛效应实证检验

Development of Digital Economy and Green Innovation Efficiency of High-End Manufacturing Industry:Empirical Test Based on Spatial Spillover and Threshold Effect

基于2012—2020年中国30个省份高端制造业面板数据,应用超效率SBM模型测算高端制造业绿色创新效率并分析其空间相关性。在此基础上,引入数字经济发展指标,应用空间杜宾模型探究数字经济发展对高端制造业绿色创新效率的空间溢出效应。研究发现:高端制造业绿色创新效率整体上升态势显著,呈“东-中-西”依次递减状态,空间上具有正相关性;数字经济发展对高端制造业绿色创新效率存在明显正向空间溢出效应。进一步通过门槛面板模型实证得出,数字经济发展对高端制造业绿色创新效率的门槛效应具有区域异质性,全国及东部地区显示为线性特征,中部地区表现为“N”型影响特征,西部地区则为“U”型影响特征。

This paper uses the panel data of high-end manufacturing industry in 30 provinces in China from 2012 to 2020,calculates the green innovation efficiency of high-end manufacturing industry and analyzes its spatial correlation by using the super-efficiency SBM model.On this basis,this paper introduces the development index of digital economy,and uses the spatial Dubin model to explore the spatial spillover effect of digital economy development on the green innovation efficiency of high-end manufacturing industry.The research finds that the overall green innovation efficiency of China's high-end manufacturing industry is significantly rising,showing a"east-central-west"descending state,with a positive spatial correlation.The development of digital economy has a significant positive spatial spillover effect on the green innovation efficiency of high-end manufacturing industry.Further empirical analysis of the threshold panel model shows that the threshold effect of the development of digital economy on the green innovation efficiency of high-end manufacturing industry has regional heterogeneity.The national and eastern regions show linear characteristics,the central region shows"N"type impact characteristics,and the western region shows"U"type impact characteristics.