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文章基于DEA-SBM模型,测度了节能减排约束下工业行业的环境技术效率,检验了环境技术效率的收敛性和门槛效应。结果表明,我国工业行业环境技术效率总体偏低,但大多数行业环境技术效率都有不断提高的趋势,存在向环境技术前沿的追赶效应。引领环境生产前沿的创新者始终是高新技术产业和清洁产业,今后的结构调整应重点扶持与发展技术含量高的产业和清洁产业。收敛性检验结果表明,低排放行业既存在绝对收敛又存在条件收敛,具有俱乐部收敛特征;全部行业和高排放行业不存在绝对收敛,但存在条件收敛,说明环境政策及扶持力度需要向高排放行业倾斜。环境规制强度与环境技术效率之间存在非线性的三重门槛特征,且对于不同行业作用有别,环境规制政策的制定应避免陷入盲目提高环境规制强度的误区。
Based on the DEA-SBM model, the paper measures the environmental technology efficiency of industrial environment under the restriction of energy conservation and emission reduction and tests the convergence and threshold effect of environmental technology efficiency. The results show that the efficiency of environmental technology in China’s industrial sector is generally low, but the efficiency of environmental technology in most industries is continuously increasing. There is a catching-up effect to the frontier of environmental technology. Innovators who lead the frontiers of environmental production are always high-tech industries and clean-ups industries. In the future, structural innovations should focus on supporting and developing industries with high technological contents and clean industries. The result of convergence test shows that there exists both the absolute convergence and the conditional convergence in the low-emissions industries, and the club has the characteristics of convergence. There is no absolute convergence in all industries and high-emissions industries, but the conditions are convergent, indicating that environmental policies and support needs to be addressed to high- tilt. There is a nonlinear triple threshold between the intensity of environmental regulation and the efficiency of environmental technology, and for different industries, the formulation of environmental regulation policies should avoid falling into the erroneous zone of blindly raising the intensity of environmental regulation.