数字经济与黄河流域制造业绿色全要素生产率关联性研究

Study on the Correlation Between Digital Economy and Green Total Factor Productivity of Manufacturing Industry in Yellow River Basin

为考察数字经济与黄河流域制造业绿色全要素生产率的关联性,构建空间计量模型与面板门槛模型,基于2011—2020年黄河流域73个地级市面板数据,探究数字经济对黄河流域制造业绿色全要素生产率的直接效应、空间溢出效应与门槛特征。实证分析结果表明:1)数字经济不仅有利于提升当地制造业绿色全要素生产率,而且通过空间溢出效应对邻近地区制造业绿色全要素生产率的提升具有促进作用;2)数字经济对黄河流域制造业绿色全要素生产率的直接效应在黄河中下游地区具有显著性,空间溢出效应仅在黄河下游地区具有显著性;3)数字经济对黄河流域制造业绿色全要素生产率的促进作用具有边际递增的非线性特征;4)知识积累水平会显著提升数字经济对黄河流域制造业绿色全要素生产率的促进效应,当知识积累水平高于门槛值后,数字经济对制造业绿色全要素生产率的促进效应将大幅度提升。

In order to investigate the correlation between digital economy and green total factor productivity of manufacturing industry in the Yellow River Basin,a spatial econometric model and a panel threshold model were constructed.Based on the panel data of 73 prefecture-level cities in the Yellow River Basin from 2011 to 2020,the direct effects,spatial spillover effects and threshold characteristics of digital economy on green total factor productivity of manufacturing industry in the Yellow River Basin were explored.The results of the empirical analysis show that a)digital economy is not only conducive to improving the green total factor productivity of local manufacturing industry,but also pro-motes the improvement of green total factor productivity of manufacturing industry in neighboring areas through the spatial spillover effect;b)The direct effect of digital economy on the green total factor productivity of manufacturing industry in the Yellow River Basin is significant in the middle and lower reaches of the Yellow River Basin,and the spatial spillover effect is significant only in the lower reaches of the Yellow River Basin;c)The promotion effect of digital economy on green total factor productivity of manufacturing industry in the Yellow Riv-er Basin is non-linear with marginal increase;d)Knowledge accumulation level will significantly enhance the promoting effect of digital econ-omy on the green total factor productivity of manufacturing industry in the Yellow River Basin,especially when the knowledge accumulation level is higher than the threshold value,the impact of digital economy on the green total factor productivity of manufacturing industry will be greatly increased.