Efficiency and regulatory issues in the Brazilian water and sewage sector: an empirical study

Tupper, Henrique César; Resende, Marcelo

doi:10.1016/j.jup.2003.11.001

Cited by 147 publications

(78 citation statements)

References 21 publications

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“…Since the gross efficiency scores are right-censored (no values above 1), we have to estimate by a Tobit model. The regression residuals from the Tobit model indicate the portion of the efficiency that remains unexplained after correcting for the control variables (Tupper and Resende 2004). Since the residuals alternate in sign, whereas a proper efficiency measure should possess a one-sided distribution, we use the procedure of Gasparini and Ramos (2003), which allows us to generate adjusted DEA scores that are confined within the [0, 1] interval:…”

Section: Other Control Variablesmentioning

confidence: 99%

Sizing the government

Witte

Moesen

2009

Public Choice

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Is there such a thing as an optimal government size? We investigate the so-called Armey curve, which claims an inverted U-shaped relationship between government size and economic performance, using non-parametric Data Envelopment Analysis (DEA). The DEA scores are linked to control variables, such as initial per capita income, openness, population density, urbanization, country size and family size. For 23 OECD-countries we estimate the country specific efficiency scores, which reveal the extent to which a country uses excess public resources to achieve the observed growth rate of GDP.

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Section: Other Control Variablesmentioning

confidence: 99%

Sizing the government

Witte

Moesen

2009

Public Choice

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“…Especificamente na área do saneamento básico foram encontradas três publicações estrangeiras (THANASSOULIS, 2000;TUPPER & RESENDE, 2004;YU & WEN, 2010) e uma brasileira (CARMO & TÁVORA, 2003).…”

Section: Modelos De Avaliação Têm-se Utilizado Da Abordagem Dataunclassified

Avaliação da eficiência da gestão dos serviços municipais de abastecimento de água e esgotamento sanitário utilizandoData Envelopment Analysis

Scaratti

Michelon

Scaratti

2013

Eng. Sanit. Ambient.

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O presente estudo teve por objetivo avaliar a eficiência da gestão dos serviços municipais de abastecimento de água e esgotamento sanitário utilizando-se da abordagem Data Envelopment Analysis. Foram avaliados 53 municípios prestadores de serviços de abastecimento de água potável e esgotamento sanitário, conforme definições da Lei 11.445/2007, com população residente entre 50 mil e 100 mil habitantes e constantes da amostra do Sistema Nacional de Informações sobre Saneamento. Utilizaram-se na avaliação 33 indicadores de desempenho cujos resultados foram transformados em medidas adimensionais de intervalo [0, 1]. Da amostra total, nove serviços de abastecimento de água potável e três de esgotamento sanitário obtiveram avaliação com índice igual a 1 e classificação eficiente, sendo que os demais obtiveram avaliação inferior, ou seja, menores que 1 e classificação ineficiente. Na avaliação agregada da gestão do saneamento básico (abastecimento de água potável e esgotamento sanitário), somente um município obteve classificação eficiente.

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“…Representing the output of a water supply service only through the volume of water delivery could be inadequate. In the literature on the subject, the existence of economies of customer density 46,47 and economies of production density 48,49 are identified as important in the sector.…”

mentioning

confidence: 99%

“…In the analysis within this industry it is important to consider the quality of the service supplied. Some diverse variables are used in the literature in order to account for quality: number of interruptions in supply 40 , water losses 47 , number of hours of daily supply 30 , coverage of the service or population served 50 , number of analyses of water sanitation control 29 , etc. In this research, the number of parameters identified in water analysis -organoleptics, physical-chemical and microbiological-are used as a proxy for quality.…”

mentioning

confidence: 99%

“…In this research, the number of parameters identified in water analysis -organoleptics, physical-chemical and microbiological-are used as a proxy for quality. In the literature, two different focuses are applied to consider quality: On the one hand, quality is included in a second stage analysis, normally a Tobit regression, using as a dependent variable the results obtained for efficiency 40,47 . On the other hand, quality is incorporated as an output variable in the model 30,50 .…”

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confidence: 99%

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Performance and ownership in the governance of urban water

García‐Rubio¹,

González‐Gómez²,

Guardiola³

2010

Proceedings of the Institution of Civil Engineers - Municipal E

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In this paper the differences in terms of performance between public and the private governance in urban water management are investigated. A statistical ranking is implemented to determine programmatic efficiency differences in DEA, using an incomplete panel data that gathers information on 20 water utilities in Andalusia, in Southern Spain. In the model, labour and operational costs are considered as inputs. The volume of revenue water, the number of connections and the network length are used as outputs. The analysis indicates that private management is more efficient. The efficiency indicators adjusted by a variable related to quality are estimated and demonstrate that privatization of the service does not mean any loss in terms of quality. However, there are no significant differences between both types of management including as a desirable input hydraulic yield as a proxy of the degree of network renovation. A lower hydraulic efficiency in private management would suggest that the need to make significant investments could be an important factor when making the decision to privatize the management of the urban water service.

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Efficiency and regulatory issues in the Brazilian water and sewage sector: an empirical study

Cited by 147 publications

References 21 publications

Sizing the government

Sizing the government

Avaliação da eficiência da gestão dos serviços municipais de abastecimento de água e esgotamento sanitário utilizandoData Envelopment Analysis

Performance and ownership in the governance of urban water

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