Lee YH and P Schmidt (1993). “A Production Frontier Model with Flexible Temporal Variation in Technical Efficiency.” in Fried HO and SS Schmidt (eds.) the Measurement of Productive Efficiency: Techniques and Applications, Oxford U.K.: 237-255.

Lee YH and P Schmidt (1993). “A Production Frontier Model with Flexible Temporal Variation in Technical Efficiency.” in Fried HO and SS Schmidt (eds.) the Measurement of Productive Efficiency: Techniques and Applications, Oxford U.K.: 237-255.

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