Ensaios sobre o desempenho das companhias estaduais prestadoras de serviços de abastecimento de água e esgotamento sanitário no Brasil

Abstract

This thesis makes two essays the performance of 26 State companies providing services of water supply and sanitation in Brazil. The study measures the efficiency based on cost function based on panel data using stochastic frontier. In this comparison, companies were compared according to "System dynamic panel-data estimation" totaling 142 comments numbers with the variation of 26 groups of panels using the variable base year of the national information system on sanitation-SNIS. The data include 1995 period compared to 2008. In modeling found that data from 2003 to 2008 showed more consistency and data were used for this study. The econometric model was normalized by the total cost price of labour input ( it W )) which is a function of capital inputs prices ( it C1 ) and energy consumption ( it E3 ) normalized by the price of the work that is also water production function ( it Y ). The inputs of capital and energy were the ones that had the highest significance on the model adopted.