Kerstens, Kristiaan; Van de Woestyne, Ignace - In: European Journal of Operational Research 234 (2014) 1, pp. 341-342
The recent contribution by Cheng et al. (2013) presents a variant of the traditional radial input- and output-oriented efficiency measures whereby original values are replaced with absolute values. This comment spells out that this article contains some imprecisions and therefore presents some...