6AIGNER D J,LOVELL C A,SCHMIDT P.Formulation and estimation of stochastic production function models [J].Journal of Econometrics, 1977 ( 6 ) : 21-37.
7MEEUSEN W,VAN DEN BROECK J.Efficiency estimation from cobbdouglas production function with composed error[J].International Economics Review, 1977( 18 ) : 435-444.
8FARRELL M J.The measurement of production efficiency [J]. Journal of Royal Statistical Society, 1957,120( 3 ) : 253-281.
9LEIBENSTEIN H. Allocative efficiency vs "X-efficiency" [J].American Economic Review,1966(56):392-415.
10COELLI T J.A computer program for frontier production function estimation:version 4.1[J].Economics Letters,1992(39):29-32.
