On the evalution of Brazilian landline telephone services companies

[摘要] In this work we investigate the relative efficiency of 34 Brazilian Landline Telephone Service companies using Data Envelopment Analysis with weight constraints in the input and output variables. We formulate two different models that take into account the performance of the companies with respect to the criteria defined by Brazilian National Agency of Telecommunications (ANATEL). We also illustrate the potential of efficiency improvement through the simulation of corporate Merger.

[关键词] DEA;telecommunications;weight constraints;DEA;telecomunicações;restrições nos pesos