Gijbels, Irène; Mammen, Enno; Park, Byeong U.; Simar, … - 1998
the production frontier is a concave monotone function. Then, a famous estimator, in the univariate input and output case …, is the data envelopment analysis (DEA) estimator which is the lowest concave monotone increasing function covering all … sample points. This estimator is biased downwards since it never exceeds the true production frontier. In this paper we …