Efficiency in Brazil's water and sanitation sector and its relationship with regional provision, property and the independence of operators

Ferro, Gustavo; Lentini, Emilio; Mercadier, Augusto C.; Romero, Carlos A.

doi:10.1016/j.jup.2013.12.001

Cited by 49 publications

(35 citation statements)

References 16 publications

(21 reference statements)

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“…This paper analyzes the ability of DEA and SFA models to assess the efficiency of water utilities (one from each family). The selection of these two models is based on the fact that they have been widely applied in the water sector [6,12] for regulatory purposes [8,13]. Input and cost minimization approaches are used for DEA and SFA, respectively, as it was assumed that water companies aim to minimize their inputs or costs.…”

Section: Methodsmentioning

confidence: 99%

“…There are plenty of studies on frontier efficiency methods applied to water distribution systems (e.g., [5,6]). These methods are used to compare the efficiency of water utilities and analyze any drivers affecting this (e.g., economies of scale and scope, public vs. private operation, or the effect of regulation in efficiency and productivity [5]).…”

Section: Introductionmentioning

confidence: 99%

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Are Frontier Efficiency Methods Adequate to Compare the Efficiency of Water Utilities for Regulatory Purposes?

Estruch-Juan

Rochera

Molinos-Senante

et al. 2020

Water

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Frontier efficiency methods have been recurrently used in the water sector to assess the performance of water utilities. These methods are also used for yardstick regulation, with greater efficiency being sought by creating competition between the utilities, which can have an impact on decision-making processes, such as tariff setting. This study analyzes the adequacy and limitations of these methods for regulatory purposes, particularly how they deal with data uncertainty and their capacity to manage large number of variables. In order to achieve this, two representative methods—a nonparametric technique (data envelopment analysis) and an econometric one (stochastic frontier analysis)—are applied to an audited sample of 194 water utilities. Results will show that the results from the methods may not be considered conclusive in the water sector and their application should be carried out with considerable reservations.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Are Frontier Efficiency Methods Adequate to Compare the Efficiency of Water Utilities for Regulatory Purposes?

Estruch-Juan

Rochera

Molinos-Senante

et al. 2020

Water

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“…A mencionada amplitude das informações disponibilizadas pelo SNIS fomentou o desenvolvimento de diversos trabalhos científicos, os quais permearam a seleção de indicadores (ALENCAR FILHO; ABREU, 2007), a avaliação de eficiência do setor de saneamento BRUSCA, 2016;FERRO et al, 2014;MAIELLO et al, 2015), a comparação da prestação de serviços entre companhias públicas e privadas (MOTTA;MOREIRA, 2006), a avaliação da influência da natureza jurídica do prestador de serviços (SABBIONI, 2008; SCRIPTORE; TONETO JÚNIOR, 2012), entre outros.…”

Section: Sistema Nacional De Informação Sobre Saneamento E Trabalhos unclassified

Avaliação de indicadores aplicados a sistemas de abastecimento de água de pequeno porte

Hamdan

Libânio

Costa

2019

Eng. Sanit. Ambient.

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RESUMO O presente trabalho visou avaliar, por meio de regressão linear múltipla (RLM), os indicadores que melhor exprimem a realidade dos sistemas de abastecimento de água de municípios de pequeno porte, com base nos desempenhos financeiro, operacional e de qualidade da água como variáveis de resposta. A organização e a seleção dos dados fiaram-se no Sistema Nacional de Informações sobre Saneamento de 2014, tendo sido selecionados os referentes a 182 municípios de Minas Gerais com população inferior a 10 mil habitantes e 56 indicadores como variáveis explicativas. Por meio da RLM, verificou-se que o comprometimento das receitas com a despesa (margem da despesa de exploração) e a razão entre a arrecadação e as despesas (índice de suficiência de caixa) são as variáveis mais relevantes para descrever o desempenho financeiro. Para descrição do desempenho operacional, os índices de perdas por ligação e de faturamento de água foram os mais recorrentes. Por fim, no que tange ao desempenho de qualidade da água, os modelos apresentaram baixos coeficientes de determinação e a não aderência dos resíduos à distribuição normal.

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“…Stochastic frontier analysis (SFA) is the most widely applied parametric method and it relies on econometric estimation assuming that the deviation from the theoretical function is attributed partly to the inefficiency and partly to the existence of measurement error (Ferro et al 2014). Hence, SFA models are capable to account for statistical noise.…”

Section: Overview Of Port Productivity Studiesmentioning

confidence: 99%

Productivity change of the Spanish Port System: impact of the economic crisis

Bartual

Molinos-Senante

Sala-Garrido

2016

Maritime Policy & Management

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Efficiency in Brazil's water and sanitation sector and its relationship with regional provision, property and the independence of operators

Cited by 49 publications

References 16 publications

Are Frontier Efficiency Methods Adequate to Compare the Efficiency of Water Utilities for Regulatory Purposes?

Are Frontier Efficiency Methods Adequate to Compare the Efficiency of Water Utilities for Regulatory Purposes?

Avaliação de indicadores aplicados a sistemas de abastecimento de água de pequeno porte

Productivity change of the Spanish Port System: impact of the economic crisis

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