Wang,K., Wei,Y.-M. and Zhang,X.(2012): A comparative analysis of China's regional energy and emission performance: Which is the better way to deal with undesirable outputs? Energy Policy, 46, 574-584.

『中国の地域におけるエネルギーと排出の成績の比較分析：望まれないアウトプットを扱うにはどちらが良い方法か？』

『Abstract
　Measuring and improving the energy performance with considering emission constraints is an important issue for China's energy conservation, pollutant emissions reduction and environmental protection. This study utilizes several data envelopment analysis (DEA) based models to evaluate the total-factor energy and emission performance of China's 30 regions within a joint production framework of considering desirable and undesirable outputs as well as separated energy and non-energy inputs. DEA window analysis is applied in this study to deal with cross-sectional and time-varying data, so as to measure the performance during the period of 2000-2009. Two treatments for undesirable outputs are combined with DEA models and the associated indicators for simplex energy performance and unified energy and emission performance measurement are proposed and compared. The evaluation results indicate that the treatment of undesirable outputs transformation is more appropriate for China's regional energy and emission performance evaluation because it has stronger discriminating power and can provide more reasonable evaluation results that characterize China's regions. The empirical result shows that east China has the highest and the most balanced energy and emission performance. The energy and emission performance of China remained stable during 2000-2003, decreased slightly during 2004-2006, and has continuously increased since 2007.

Keywords: Energy efficiency; CO2 emissions; Performance evaluation』

1. Introduction
2. DEA based methods for energy and emission performance evaluation
　2.1. Energy performance evaluation model　
　2.2. Energy and emission performance evaluation model
　2.3. DEA window analysis and rank sum test
3. Data, variables and descriptions of China's regions and areas
4. Comparative analyses of China's regional energy and emission performance
　4.1. Operationalizing the methods
　4.2. Comparative analyses of performance under different undesirable outputs treatments
　4.3. Comparative analyses of simplex energy performance and unified energy and emission performance
　4.4. Discussions on the performance evaluation results
5. Conclusion
Acknowledgement
References

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