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以北京市2012年投入产出表为基础,并使用表中42个部门生产过程中主要消耗的15种能源及燃烧这些能源量所排放的二氧化碳量进行象限扩充,构建出“碳排”投入产出模型,并计算各部门的完全(包含了间接的)能耗量及完全碳排量。然后以完全能耗量作为投入,GDP作为产出,完全碳排量作为非期望产出,通过改进型环境DEA模型,对北京市42个部门的“能耗—产出—碳排”这三位一体的环境表现指数进行效率值评估。结果表明,北京市只有3个部门为DEA有效的;在非有效部门当中,第二产业效率值普遍较高,而第三产业部门的效率值却很低。基于上述结论,提出北京市产业结构优化升级的建议。
Based on Beijing’s input-output table in 2012 and quadrant expansion using the 15 main types of energy consumed in the 42 sector production processes and the amount of carbon dioxide emitted from burning these energy sources, a “carbon emission” Input-output model, and calculate the complete (including indirect) energy consumption and total carbon emissions of each department. Then, with total energy consumption as input, GDP as output and total carbon emission as undesired output, the “energy consumption-output-carbon emission” of 42 sectors in Beijing was evaluated through the improved environmental DEA model. This Trinity Environmental Performance Index performs an efficiency rating. The results show that there are only three departments in Beijing effective for DEA. Among the non-effective departments, the secondary industry is generally higher in efficiency while the tertiary industry is less efficient. Based on the above conclusions, the paper proposes the proposal of optimizing and upgrading the industrial structure in Beijing.