@article {7723,
	title = {Robust Nonparametric Frontier Estimation in Two Steps},
	journal = {Econometric Reviews},
	volume = {42},
	year = {2023},
	pages = {612-634},
	publisher = {Submitted},
	author = {Chen, Y. and Torrent, H. S. and F. A. Ziegelmann}
}
