Fang, Lei; Li, Hecheng - In: European Journal of Operational Research 230 (2013) 2, pp. 444-446
In a recent paper by Li and Cheng [Li,S.K., Cheng, Y.S., 2007. Solving the puzzles of structural efficiency. European … structural efficiency theoretically. However, we observe that the optimal shadow price vector in the shadow price model by Li and … Cheng (2007) is not always unique. As a result, the decomposition of the structural efficiency is arbitrarily generated …