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BERGET A N,HUMPHREY D B.The Dominance of Iinefficiency over Scale and Product Mix Economicis in Banking[J].Journal of Monetary Economics,1991(28):117-148. 刘小玄.;中国工业企业的所有制结构对效率差异的影响-1995年全国工业企业普查数据的实证分析[J]