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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. 劉小玄.;中國工業企業的所有制結搆對傚率差異的影響-1995年全國工業企業普查數據的實証分析[J]