Eskelinen, Juha; Halme, Merja; Kallio, Markku - In: European Journal of Operational Research 232 (2014) 3, pp. 654-663
technical efficiency considerations. The branches operate in heterogeneous environments. We deal with the heterogeneity by …. We employ benchmark units similarly as in value efficiency analysis (VEA). However, we extend VEA in two ways. First, in … benchmark technology may or may not be in the feasible set. Second, we consider efficiency tests employing a benchmark with …