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New evidence on returns to scale and product mix among U.S. commercial banks[J] . David C Wheelock,Paul W Wilson.Journal of Monetary Economics . 2001 (3)
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Scale and scope economies of Australian permanent building societies in a dynamic framework[J] . Neil Esho,Ian G Sharpe.Asia Pacific Journal of Management . 1994 (2)
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The relative efficiency of stock versus mutual S&Ls: A stochastic cost frontier approach[J] . A. Sinan Cebenoyan,Elizabeth S. Cooperman,Charles A. Register,Sylvia C. Hudgins.Journal of Financial Services Research . 1993 (2)