摘要
基于2011-2020年省域面板数据,采用DEA-SBM模型测算中国工业绿色创新效率,以高新技术产品进口贸易额来表示进口贸易水平,既作为解释变量又作为门槛变量,构建门槛模型并实证分析进口贸易对其产生的影响。研究表明:进口贸易水平对工业绿色创新效率的增长具有显著的门槛效应。当高新技术产品进口贸易额位于第一区间时,进口贸易促进工业绿色创新效率的效果较低;在越过第一门槛值时,较之前门槛值有所上升,说明在越过门槛值后,进口贸易对工业企业绿色创新效率的促进作用有所增加。
Based on the provincial panel data from 2011 to 2020,this paper uses the DEA-SBM model to measure the green innovation efficiency of Chinese industry.The import trade volume of high-tech products is employed to represent the level of import trade,which is taken as both the threshold variable and the threshold variable,to construct a threshold model.Using the model,the import trade impact on the green innovation efficiency of Chinese industry is empirically analyzed.The research shows that the level of import trade has a significant threshold effect on the growth of industrial green innovation efficiency.When the import volume of high-tech products is in the first range,the effect of import trade on promoting industrial green innovation efficiency is low;after crossing the first threshold,the threshold value is increased compared with the previous threshold value,indicating that the promotion effect of import trade on the green innovation efficiency of industrial enterprises has increased.
作者
王兆媛
Zhaoyuan Wang(College of Literature Law&Economics,Wuhan University of Science&Technology,Wuhan,Hubei,430065,China)
