Bojanic AN, SB Caudill and JM Ford (1998). “Small-Sample Properties of Ml, Cols, and DEA Estimators of Frontier Models in the Presence of Heteroscedasticity.” EJOR 108(1): 140-148.

Bojanic AN, SB Caudill and JM Ford (1998). “Small-Sample Properties of Ml, Cols, and DEA Estimators of Frontier Models in the Presence of Heteroscedasticity.” EJOR 108(1): 140-148.

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