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Luenberger and Malmquist productivity indices in Japan, 1955 - 1995
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Productivity measurement in the presence of "poorly priced" goods
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Luenberger and Malmquist productivity indices : theoretical comparisons and empirical illustration
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Non-convex technologies and cost functions : definitions, duality and nonparametric tests of convexity
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Portfolio selection in multidimensional general and partial moment space
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