三阶段DEA的区域建筑业碳排放效率评价

为剔除环境因素和随机误差对区域建筑业碳排放效率评价结果的影响,采用三阶段数据包络法(DEA)对区域建筑业碳排放效率进行评价.以非期望产出的建筑业碳排放替代建筑业能源消耗作为投入指标,并将能源结构系数作为环境变量,建立基于三阶段DEA的区域建筑业碳排放效率评价模型.以2003-2012年区域建筑业碳排放进行实证分析,研究结果表明:规模效率偏低是区域建筑业碳排放综合效率不高的主要原因;经济发达程度与建筑业碳排放技术效率相关性不大,但经济欠发达地区建筑业碳排放的规模效率普遍较低;建筑业碳排放冗余最为显著,累计冗余率达到0.38.

Study of Carbon Emission Efficiency of Construction IndustryBased on Three-Stage Data Envelope Analysis Model

In order to eliminate the influences of the environmental factors and random error on the construction industry of carbon emission efficiency evaluation results, the technique of three-stage-DEA(data envelope analysis)model was introduced to evaluate the carbon emission efficiency of regional construction. Regarding the unexpected output of construction industry carbon emission as the input index to replace the energy sources consumption, and introducing the coefficient of the energy structure, the construction carbon efficiency evaluation model was established based on a three-stage DEA model. The construction carbon emission in different provinces from 2003 to 2012 was analyzed. The results show that the low scale efficiency is the main reason that causes the low comprehensive efficiency of regional construction; there is a little correlation between carbon emission efficiency of regional construction and economic level, but the scale efficiency in underdeveloped areas is generally low; the carbon emission redundancy of the construction is the most significant, and the accumulative redundancy rate reaches 0.38.