考虑CO2排放的中国八大集装箱港口环境效率评价研究-基于SBM-DEA模型

An analysis on Environmental efficiency of Chinese Container ports with CO[sub_s]2[sub_e] emissions – based on SBM(Slacks based measurement) DEA

摘要:

本研究使用SBM-DEA模型,评价2005-2011年中国8个集装箱港口的环境效率。将各港口的各年度CO₂排放量设定为非期望产出,分析 CO₂排放量对效率的影响 。分析结果显示集装箱港口碳排放量对港口效率给予了负向影响。8个集装箱港口的评价环境效率各模型上呈现0.476-0.764的水平。8个港口均在2005年-2011年均呈现了不同程度的非效率,非效率发生的原因是港口投入要素过多,同时投入相比集装箱吞吐量过少,以及环境要素的二氧化碳排放量过大所造成。另外,2008年世界金融危机对2009年效率上也产生负的影响。

Abstract:

This research evaluates 8 Chinese container ports’ environmental efficiency using SBM-DEA method. And the CO₂ emission of ports is set as undesirable output and analysis its effect on container port’s efficiency. The results show that the CO₂ emissions give a negative effect on the container port efficiency. And the average Chinese 8 container ports environmental efficiency is in the range from 0.476-0.764. Environmental efficiency of container ports show different degrees of inefficiency in 2005-2011, the reason of inefficiency is that excess of inputs and undesirable output factors, and lack of the container throughput. And the global financial crisis in 2008 has a negative effect on the ports’ efficiency in 2009.