A Generalized Production Frontier Approach for Estimating Determinants of Inefficiency in U.S. Dairy Farms Subal C. Kumbhakar, Soumendra Ghosh and J. Thomas McGuckin Journal of Business & Economic Statistics, Vol. 9, No. 3 (Jul., 1991), pp. 279-286
(article consists of 8 pages) Published by: American Statistical Association Stable URL: http://www.jstor.org/stable/1391292
多谢了！~