Bài báo/NewspaperTác giả : Dennis Aigner (1977)
Previous studies of the so-called frontier production function have not utilized an adequate
characterization of the disturbance term for such a model. In this paper we provide an ap propriate specification, by defining the disturbance term as the sum of symmetric normal and
(negative) half-normal random variables. Various aspects of maximum-likelihood estimation
for the coefficients of a production function with an additive disturbance term of this sort are
then considered. 
