6Grannemann T W, Brown R S, Pauly M V. Estimating hospital costs: A multiple-output analysis[J]. Journal of Health Economics, 1986, 5(2): 107-127.
7Aletras V, Kontodimopoulos N, Zagouldoudis A, et al. The short-term effect on technical and scale efficiency of establishing regional health systems and general management in Greek NHS hospitals[J]. Health Policy, 2007, 83(2/3): 236-245.
8Vita M G. Exploring hospital production relationships with flexible functional form[J]. Journal of Health Economics, 1990(9): 1-21.
9Pereira A. Economies of scale in blood banking: A study based on Data Envelopment Analysis[J]. Vox Sanguinis, 2006, 90(4): 308-315.
