Carbon Emission Efficiency Characteristics Of Construction Industry In China Based On Three-stage Super Efficiency SBM-DEA Model

Global climate caused by massive carbon emissions is severe in recent years.China has a pivotal position in the international community.Therefore,it shoulders the major responsibility and mission of actively exploring carbon emission reduction paths and alleviating global climate.Construction industry,as one of the important pillar industries in economic system in China,generates a large amount of energy consumption and carbon emissions while supporting the rapid development of the national economy.It is necessary to clarify the construction industry carbon emissions,calculate the construction industry carbon emission efficiency,and explor the internal and external factors about the construction industry carbon emissions in China.The results provide a theoretical basis for formulating the low-carbon development strategy of provincial construction industry.Based on the construction industry carbon emission efficiency in China,this paper establishes a comprehensive construction industry carbon emission calculation model,and accurately calculates the direct and indirect construction industry carbon emissions in 30 provinces.Then this paper constructs the three-stage SBM-DEA construction industry carbon emission efficiency evaluation model and the Malmquist-Luenberger index model containing undesired outputs,which measure and analyze the static and dynamic efficiency of construction industry carbon emissions in various regions,provinces and municipalities.The results targeted recommendations for improving the construction industry carbon efficiency.The study found that:(1)Construction industry carbon emission efficiency in the eastern region is significantly higher than that of other regions,and closer to the production front,which that in each province is unevenly distributed,such as Beijing,Shanghai,Zhejiang,and Jiangsu have higher carbon emission efficiency and lower emission reduction potential.On the contrary,Hebei,Shandong,Inner Mongolia,Yunnan and other provinces have lower carbon emission efficiency and higher emission reduction potential.Therefor,these provinces face greater problems on construction industry.(2)Based on the regression analysis of environmental variables in the SFA,it is found that the industrial structure,energy structure,technical level and urbanization process environmental variables selected in this paper are significantly correlated in the regression results,indicating that these environmental variables are for the construction industry carbon emission efficiency has a great impact,and it is necessary to eliminate the influence of environmental variables in the third stage for efficiency measurement.(3)Through eliminating the above environmental factors,the construction industry carbon emission efficiency is measured from the perspective of internal management efficiency in each province.As a result,the construction industry carbon emission efficiency in the eastern region has decreased significantly,and some provinces in the central and western regions have declined slightly,but in Inner Mongolia,Qinghai,Henan,the efficiency has improved,and there has been no significant change in the northeastern region.It is found that from the perspective of internal management efficiency,the gaps in various regions have been reduced.The geographical advantages and development basis are important factors leading to the uneven development of the construction industry in various regional provinces in China.(4)Analysis of the construction industry dynamic efficiency evaluation shows that the varies greatly in China.The efficiency improvement in the eastern region mainly depends on technological progress and pure technical efficiency,while the central and western regions are dependent on economies of scale larger.