管理学报
 
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J4  2011, Vol. 8 Issue (3): 456-    DOI:
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China s Provincial Energy Efficiency Measurement based on DEA and Directional Distance Function
 WANG Ke-Liang, YANG Bao-Chen, YANG Li
1. Tianjin University, Tianjin, China; 2.Anhui University of Science and Technology, Huainan, Anhui, China

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