Nolan JF, PC Ritchie and JR Rowcroft (2001). “Measuring Efficiency in the Public Sector Using Nonparametric Frontier Estimators: A Study of Transit Agencies in the USA.” Appl Econ 33(7): 913-922.
Nolan JF, PC Ritchie and JR Rowcroft (2001). “Measuring Efficiency in the Public Sector Using Nonparametric Frontier Estimators: A Study of Transit Agencies in the USA.” Appl Econ 33(7): 913-922.