Small-sample properties of ML, COLS, and DEA estimators of frontier models in the presence of heteroscedasticity. - Antonio N. Bojanic; Steven B. Caudill; Jon M. Ford (Eur. J. Oper. Res., 1998)

Small sample properties of ML, COLS and DEA estimators of frontier models in the presence of heteroscedasticity: A reply to Banker, Chang, and Cooper. - Antonio N. Bojanic; Steven B. Caudill; Jon M. Ford (Eur. J. Oper. Res., 2002)