“一带一路”沿线省域绿色投资效率评价研究

A Study on the Evaluation of Green Investment Efficiency in Provinces along “The Belt and Road”

基于“一带一路”17个沿线省区市2003—2017年的数据,采用以投入为导向的三阶段DEA模型测度各省区市的绿色投资效率水平,并分析影响投资效率水平的环境因素。实证结果表明:“一带一路”沿线省区市目前的绿色投资普遍缺乏效率,“丝绸之路经济带”省区市的测度结果低于整体平均水平,“21世纪海上丝绸之路”省区市的测度结果高于整体平均水平;在剔除环境变量和随机因素的影响后,绿色投资效率水平有所上升,说明现有环境因素对投资效率存在影响;纯技术效率和规模效率缺乏会导致我国绿色投资效率水平低下,技术管理水平较低、产业结构未能实现优化配置以及资源配置不合理使得资源投入存在过度虚耗问题,从而降低了绿色投资效率。

Based on the data of the 17 provinces and cities along the“Belt and Road”from 2003 to 2017,this paper uses an input-oriented three-stage DEA model to measure the green investment efficiency level of each province and city,and analyze the environmental factors affecting the investment efficiency level.The empirical results show that the current green investment in the provinces along the“Belt and Road”is generally inefficient,and the measurement results in“Silk Road Economic Belt”provinces and cities are lower than the overall average,and the measurement results in“Maritime Silk Road”provinces and cities are higher than the overall average.After eliminating the impact of environmental variables and random factors,the level of green investment efficiency has increased,indicating that existing environmental factors have an impact on investment efficiency.The lack of pure technology efficiency and scale efficiency will lead to low efficiency of green investment in China.What’s worse,the low level of technical management,the failure of optimal allocation of industrial structure and the unreasonable allocation of resources will lead to the problem of excessive consumption of resources investment,thus reducing the efficiency of green investment.