Cherchye L and T Van Puyenbroeck (2001). “Product Mixes as Objects of Choice in Non-Parametric Efficiency Measurement.” EJOR 132(2): 287-295.

Cherchye L and T Van Puyenbroeck (2001). “Product Mixes as Objects of Choice in Non-Parametric Efficiency Measurement.” EJOR 132(2): 287-295.

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