Research on Energy Environmental Efficiency Evaluation and Environmental Strategy Selection in Eastern China——Based on the Dynamic Cross-efficiency Model of Natural Disposability and Management Disposability
In recent years,with the continuous increase in global energy consumption,the resource and environ-mental pressures faced by China's sustained economic growth due to environmental pollution,climate change,and other impacts have become a focus of attention for the government and various sectors of society.How to improve energy utilization efficiency has gradually become an important issue that urgently needs to be solved in China's economic development.The eastern region is a leading one for China's reform and opening up,and its energy-saving and emission reduction experience and measures can provide reference for other regions to a certain extent.Therefore,using scientific quantitative methods to evaluate the energy and environmental efficiency of the eastern region is of great significance for improving the energy utilization efficiency of the eastern region and com-prehensively establishing a two-type society of"resource conservation and environmental friendliness".In the study of energy and environmental efficiency evaluation,scholars mainly use Data Envelopment Anal-ysis(DEA)methods,but existing research still have shortcomings:(1)Existing research mainly focuses on self-evaluation systems,and rarely evaluates efficiency from mutual-evaluation systems,leading to incomplete evalua-tion results.(2)Regarding unexpected outputs in energy and environmental systems,previous studies have mostly established DEA models by distinguishing between weak disposability and strong disposability.Weak disposability assumes that all decision-making units adopt the same emission reduction strategy,while strong disposability assumes that unexpected outputs can be arbitrarily reduced,which is inconsistent with the actual production process of decision-making units.(3)Previous studies have mostly evaluated the energy and environ-mental efficiency of decision-making units,with little research on their environmental strategy choices in response to environmental regulations.In response to the above shortcomings,the paper combines the aggressive cross-efficiency model with the dynamic DEA model considering transfer activities to establish a new dynamic cross efficiency model for natural disposability and management disposability,and an environmental strategy selection model is established based on the efficiency ratio of decision units in the two models.Based on the relevant data from the China Statistical Yearbook(2016-2020)and the China Energy Statistical Yearbook(2016-2020),the total energy consump-tion and employment are selected as conventional input indicators,capital stock is selected as unconventional input indicators,and is used as a transfer variable between consecutive periods.Regional GDP is used as the expected output indicator,while sulfur dioxide and carbon dioxide emissions are used as unexpected output indi-cators.An empirical study is conducted on the energy and environmental efficiency and environmental strategy choices in the eastern region of China from 2015 to 2019.In the empirical analysis section,the efficiency of the eastern region is compared under two models,and their environmental strategy choices are analyzed.Finally,suggestions for energy and environmental improvement are proposed.The results indicate that during the period of 2015-2019,most provinces and cities had higher energy and environmental efficiency under natural disposability,while under management disposability,most provinces and cities had lower energy and environ-mental efficiency,indicating significant potential for energy conservation and emission reduction.From the perspective of the entire research period,provinces and cities outside Tianjin adopting natural disposability strate-gies are more effective in improving energy and environmental efficiency,while Tianjin adopting management disposability strategies is more helpful in improving efficiency.Therefore,Tianjin should carry out technological in-novation through capital accumulation,and the country needs to increase its financial support.Provinces and cities outside Tianjin need to limit the blind expansion of their high energy consuming industries,accelerate the upgra-ding of industrial structure,and transfer or eliminate related backward enterprises.At the same time,other prov-inces and cities should strengthen technological exchanges with Tianjin,share Tianjin's technological innovation achievements,and promote the improvement of energy and environmental efficiency in the entire eastern region.
energy and environmental efficiencyaggressive cross-efficiencynatural disposabilitymanagement disposabilityenvironmental strategy
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