Estudo da estrutura de custos e da economia de escala do setor de telecomunica????es m??veis do Brasil p??s-privatiza????es

O setor de telecomunica????es passou por significativas transforma????es estruturais, inova????es tecnol??gicas e mudan??as nos processos regulat??rios nas ??ltimas d??cadas, em n??vel mundial. No Brasil, a telefonia m??vel, p??s-privatiza????es, seguiu a mesma tend??ncia, desenvolvendo uma complexa estrutura oligopolista. Inicialmente, com a abertura do mercado, foi adotada uma estrutura na qual a competi????o se dava entre operadoras de Banda A e B. Num segundo momento, com o cumprimento das metas de universaliza????o, previstas pelo novo modelo de telecomunica????es brasileiro, a concorr??ncia entre as operadoras foi intensificada, com a entrada das operadoras de Banda D e E. Dadas as mudan??as ocorridas na estrutura de mercado do setor de telefonia brasileiro, no per??odo p??s-privatiza????es, este estudo teve por objetivo verificar se as operadoras de telefonia m??vel brasileiras estavam usufruindo de economias de escala atrav??s da an??lise da fun????o de custo polinomial e das curvas de custos. A pesquisa foi de natureza aplicada doThe telecommunication sector has been through significant structural transformations, technological innovations and changes in the regulatory processes, worldwide over the last decades. In Brazil, the mobile telephony, after-privatizations, followed the same trend, developing a complex oligopolistic structure. Initially, with the opening of the market, was adopted a structure in which the competition took place between A and B Bands operators. The second moment, with the achievement of the universalization targets, predictable by the new Brazilian telecommunications model, the competition between the operators was intensified, with the entrance of D and E Bands operators. Thus, with all the changes in the market structure of the Brazilian telephony sector, in the after-privatizations phase, this study aims to verify if the Brazilian operators of mobile telephony were usufructing economies of scale, through the analysis of the polynomial cost function and of cost curves. The research was of applied nature o