Drake L and R Simper (2002). “X-Efficiency and Scale Economies in Policing: A Comparative Study Using the Distribution Free Approach and DEA.” Appl Econ 34(15): 1859-1870.
Drake L and R Simper (2002). “X-Efficiency and Scale Economies in Policing: A Comparative Study Using the Distribution Free Approach and DEA.” Appl Econ 34(15): 1859-1870.