Was the bell system a natural monopoly? An application of data envelopment analysis

Author: Chang Hsihui  

Publisher: Springer Publishing Company

E-ISSN: 1572-9338|145|1|251-263

ISSN: 0254-5330

Source: Annals of Operations Research, Vol.145, Iss.1, 2006-07, pp. : 251-263

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