8AIGNER D J, LOVELL C A K, SCHMIDT P. 1977.Formulation and estimation of stochastic frontier production function models [J]. Journal of Econometrics, 6(1): 21-37.
9BATTESE G E,COELL T J.1995. A model for technical inefficiency effects in a stochastic frontier production function for panel data [J].Empirical Economics, 20(2):325-332.
10JHA R, CHITKARA P, GUPTA S. 2000. Productivity,technical and allocative efficiency and farm size in wheat farming in India: a DEA approach[J].Applied Econo-mics Letters,7(1):1-5.