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

Zhou

et al. 2018

Water

Abstract:Water resources are important and irreplaceable natural and economic resources. Achieving a balance between economic prosperity and protection of water resource environments is a major issue in China. This article develops a data envelopment analysis (DEA) approach with undesirable outputs by using Seiford's linear converting method to estimate water use efficiencies for 30 provinces in China, from 2008-2016,and then analyzes the influencing factors while using a DEA-Tobit model. The findings show that the overall water use efficiency of the measured Chinese provinces, when considering sewage emissions as the undesirable output, is 0.582. Thus, most regions still need improvement. Provinces with the highest water efficiency are located in economically developed Eastern China. The spatial pattern of water use efficiency in China is consistent with the general pattern of regional economic development. This study implies that factors like export dependence, technical progress, and educational value have a positive influence on water use efficiency. Further, while industrial structure has had a negative impact, government intervention has had little impact on water use efficiency. These research results will provide a scientific basis for the government to make plans for water resource development, and it may be helpful in improving regional sustainable development.

Section: Introductionmentioning

confidence: 99%

Water Use Efficiency and Its Influencing Factors in China: Based on the Data Envelopment Analysis (DEA)—Tobit Model

Zhou

et al. 2018

Water

“…Even so, it is prudent to expect that if there is an improvement in the provision of these services, there will be a reduction in hospitalizations caused by parasitic-infectious diseases. Scaratti, Michelon and Scaratti (2013) evaluated the management of municipal water supply and sewage services efficiency with an expanded view on the topic. The authors listed the sector's efficiency indicators from the customers perspective (final consumer of services), the market (supply and demand for water and sewage), product and service compliance (water quality and sewage treatment level) and business performance (total expenditure on exploration, personnel, repairs and revenue).…”

Section: Efficiency Studies On the Brazilian Sanitation Sectormentioning

confidence: 99%

The Impact of Inefficient and Inadequate Sanitation Diseases on the Average Cost of Hospital Admissions in Brazilian Municipalities

Medeiros

Ferreira

2020

Estudo & Debate

The present work has as its objective to evaluate how the investment and sanitation indicators, as well as how the efficiency of those services affect the average cost of hospital stays due to parasitic-infectious diseases linked to poor sanitation in brazilian municipalities. To achieve the given objectives, the efficiency of sanitation services was measured using the data envelopment analysis technique and a multiple regression analysis was estimated using explanatory variables which captured the effect of an improvement in the quality and access to sanitation as well as an increase in investment on provided services. The results showed that 20% of municipalities have efficient services and that the investment in new water and sewer links to the installed sewage network, as well as an increase in the extension of water pipe links for each meter of the service network contribute to reduce the average cost of hospital stays due to diseases associated to inadequate sanitation. With respect to validity and adjustment of the model, its performance was deemed satisfactory having in mind the fact that it did not violate the necessary assumptions of the multiple regression model. With the results found it is possible to enlighten in an objective way that the main sanitation parameter that must be prioritized in a national policy which does not fail in its objectives is the increase in the access of piped water.

“…The difficulty in providing public sanitation services, in terms of access and quality, are governance challenges to be overcome in the next two decades, as highlighted by several authors [ 9 , 16 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. Studies in the field reveal a growing preoccupation in better understanding the causes and consequences of efficiency problems in the use of infrastructure, human, and financial resources in this sector, in order to boost development and competitiveness between agencies and sanitation companies.…”

Section: Introductionmentioning

confidence: 99%

“…Studies concerning Brazil on the subject are also found in the literature, where a concentration of the use of the conventional DEA approach is identified from a methodological point of view. The results of this approach, however, are sensitive to the choice of resources and products [ 18 , 22 , 24 , 25 , 31 , 32 ], previous studies have limitations of approach in estimating the efficiency of basic sanitation. Firstly, national and international studies are limited to samples of BSUs by arbitrary criteria of quantity of observations and types of BSU (public, private, regional, local, integrated or not, etc.…”

Section: Introductionmentioning

confidence: 99%

“…), like Macedo [ 18 ], which adopted only 18 BSUs representative of federation units for the evaluation of productivity in Brazil, and Abbott et al [ 33 ] who used aggregated BSU data from six Australian capitals to assess productivity in the Basic sanitation sector. Second, for the Brazilian results, the existing studies are still few about the integrated management of Brazilian Basic sanitation [ 22 ]. In addition, there is no uniformity of inputs (resources) and outputs (products) in the literature, which makes it difficult to compare the sector performance in terms of the robustness of the model and the decision-making power in allocating scarce resources and creating priorities in sector’s planning [ 20 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Efficiency of Basic Sanitation Integrated Management in Brazilian Municipalities

Cavalcanti

Teixeira

Pontes

2020

IJERPH

This study aims to evaluate the level of technical efficiency of companies that perform the integrated management of basic sanitation in Brazilian municipalities. A Multiple Data Envelopment Analysis (M-DEA) model was applied to estimate the performance of water supply and sewage services in 1628 municipalities covering more than 56% of the Brazilian population, identifying the factors that most influence the efficiency of the sector in the years 2008 and 2016. The M-DEA methodology is an extension of Data Envelopment Analysis (DEA) with multiple DEA executions considering all combinations of inputs and outputs to calculate efficiency scores. The methodology reduces possible biases in the selection of resources and products of the model, ability to support decision-making in favor of improvements in the sector′s efficiency based on national regulatory framework. The analyses show that the companies analyzed can increase their operating results and attendance coverage by more than 60%, given the current levels of infrastructure, human and financial resources in the sector. Based on the simulation of potential efficiency gains in Brazilian basic sanitation companies, the estimates show that the coverage of the population with access to sanitary sewage would go from the current 59.9% to 76.5%. The evidence found provides indications to subsidize sanitation management in the country at the micro-analytical level, enabling a better competitive position in the sector for the integrated management of basic sanitation and its universalization in Brazil.