Keshvari, Abolfazl; Kuosmanen, Timo - In: European Journal of Operational Research 231 (2013) 2, pp. 481-491
Isotonic nonparametric least squares (INLS) is a regression method for estimating a monotonic function by fitting a step function to data. In the literature of frontier estimation, the free disposal hull (FDH) method is similarly based on the minimal assumption of monotonicity. In this paper, we...