技术创新、环境规制与城市绿色全要素能源效率——基于动态面板门槛模型的实证分析

Technological Innovation,Environmental Regulation and Green Total Factor Energy Efficiencyin Cities——Empirical Analysis Based on Dynamic Panel Threshold Model

基于2004—2016年中国271个地级市的面板数据,构建动态面板门槛模型,探究环境规制对技术创新影响绿色全要素能源效率的非线性效应。结果显示:技术创新能够显著提升绿色全要素能源效率,且这种提升作用存在门槛特征,在环境规制处于门槛值以上时,提升作用较大。技术创新直接通过绿色技术创新效应、间接通过经济增长效应、产业结构升级效应、外商直接投资效应等影响绿色全要素能源效率,并且只有当环境规制水平超过门槛值时,间接影响机制才有效。中国每年越过环境规制门槛值的城市数量逐年递增,但是仍有少量城市在样本期内未跨越门槛值。

The nonlinear effects of environmental regulations on technological innovation affecting green total factor energy efficiency are explored based on panel data from 271 prefecture-level cities in China from 2004-2016.The results show that:technological innovation can significantly enhance green total factor energy efficiency,and there is a threshold feature for this enhancement effect,which is greater when the environmental regulation is above the threshold value.Technological innovation affects green total factor energy efficiency directly through the green technological innovation effect and indirectly through the economic growth effect,industrial structure upgrading effect,and foreign investment effect,and the indirect influence mechanism is effective only when the environmental regulation level exceeds the threshold.The number of cities crossing the threshold of ER in China increases year by year,which helps TI play a role in improving GTFEE,but there are still a small number of cities that do not cross the threshold during the sample period,which should attract the attention of local governments.