摘要
基于我国30个省份2008—2017年的面板数据,采用非期望产出的SBM模型测度地区绿色技术创新效率,进而利用门槛面板模型实证研究了贸易溢出与绿色技术创新效率的门槛效应。研究表明:贸易溢出显著地存在环境规制强度的双门槛效应,且与绿色技术创新效率呈"U"型关系,只有当环境规制强度跨过特定门槛值时,贸易溢出与绿色技术创新效率才呈显著的正相关关系;环境规制强度除作为门槛变量对绿色技术创新效率呈间接作用外,还对绿色技术创新效率表现为显著的直接推动作用;政府支持度、研发投入、经济发展水平是影响地区绿色技术创新效率的关键因素。
Based on the panel data of 30 provinces from 2008 to 2017,the non-expected output SBM model was used to measure the regional green technology innovation efficiency,and then the threshold effect of trade spillover and green technology innovation efficiency was empirically studied by using the threshold panel model.The result shows that trade spillover has a significant doublethreshold effect of environmental regulation intensity and "U" relationship with green technology innovation efficiency.Only when environmental regulation intensity crosses a certain threshold value,trade spillover has a significant positive correlation with green technology innovation efficiency.In addition to the indirect role of environmental regulation intensity as a threshold variable,it also plays a significant direct role in promoting the efficiency of green technology innovation.Government support,R&D investment and economic development level are the key factors affecting the efficiency of regional green technology innovation.
引文
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