Retornos a escala en agua y saneamiento: estimaciones para América Latina

Ferro, Gustavo and Lentini, Emilio and Mercadier, Augusto and Romero, Carlos A. (2010): Retornos a escala en agua y saneamiento: estimaciones para América Latina.

Abstract

In the whole world there are strong discussions on how to yield a more equitable access and a more efficient provision. One issue linked to efficiency is the achievement of scale economies in the industry, and the optimal dimension of water and sanitation providers. Changes in the industrial structure of the sector, through mergers in highly atomized services, the splitting of very concentrated ones, or the property discussion (private versus public) had been hotly debated in different countries. Many times, the decisions had politicized because of the social complexity of the sector. In this study, we aim to estimate the presence of returns to scale, exploiting a database of water and sanitation providers in Latin America. Public policy consequences are direct: if those returns to scale do exist, and the sector is not taking advantage of them, the agglomeration of small providers can eventually save resources which are useful to solve the coverage shortages and the insufficient access for the poor in the region. The scale economies study adds a technical argument to the discussion, because the prescription could be, as it happens to suggest the study, of the convenience of agglomerating small providers to reduce unit costs.

• Item Type: MPRA Paper
• English Title: Returns to scale in water and sanitation: estimates for Latin Amercia
• Language: Spanish
• Keywords: returns to scale, economies of scale, water and sanitation
• Subjects: L - Industrial Organization > L5 - Regulation and Industrial Policy > L51 - Economics of Regulation; L - Industrial Organization > L9 - Industry Studies: Transportation and Utilities > L95 - Gas Utilities ; Pipelines ; Water Utilities; D - Microeconomics > D2 - Production and Organizations > D24 - Production ; Cost ; Capital ; Capital, Total Factor, and Multifactor Productivity ; Capacity

References

Antonioli, B. y M. Filippini (2001). "The use of a variable cost function in the regulation of the Italian water industry," Utilities Policy, Elsevier, vol. 10(3-4), pages 181-187.

Ashton, J. (1999), Economies of scale, economies of capital utilization and capital utilization in the English and Welsh water industry, Bournemouth University, School of Finance and Law Working Paper Series, 17

Baranzini, Andrea, Anne-Kathrin Faust y David Maradan (2008). Water supply: costs and performance of water utilities. Evidence from Switzerland. 13th International Water Resources Association. World Water Congress. Montpellier, 1-4 September.

Bhattacharya, A., E. Parker y K. Raffiee (1994). “An examination of the effect of ownership on the relative efficiency of public and private water utilities”. Land Economics 70(2), pp. 197-209.

Bhattacharyya, A., T. R. Harris, R. Narayanan y K. Raffiee (1995). Specification and estimation of the effect of ownership on the economic efficiency of the water utilities. Regional Science and Urban Economics 25, 759-784.

Berg, Sanford y Claudia Vargas (2008). Bolivian utility regulation: lessons for a water sector agency. Paper # 08-11. Public Utility Research Center, University of Florida.

Bottasso, A. y M. Conti (2003). “Cost Inefficiency in the English and Welsh Water Industry : An Heteroskedastic Stochastic Cost Frontier Approach”. Noviembre.

Bottasso, A. y M. Conti (2009). “Scale economies, technology and technical change in the water industry: Evidence from the English water only sector”. Regional Science and Urban Economics 39 (138–147).

Chamber, Robert (1988). Applied production análisis. Cambridge: Cambridge University Press.

Christensen L. R. y W. H. Greene. Economies of scale in U.S. electric power generation. Journal of Political Economy 84, 655–676.

Christensen, Laurits, Dale Jorgenson y Lawrence Lau (1973). "Transcendental Logarithmic Production Frontiers". The Review of Economics and Statistics, MIT Press, vol. 55(1), pages 28-45, February.

De Witte, Kristof y Ebert Dijkgraaf (2007). Mean and bold? On separating merger economies from structural efficiency gains in the drinking water sector. Tinbergen Institute Discussion Paper 2007-092/3

De Witte, Kristof y Rui Marques (2007). Designing Incentives in Local Public Utilities, an International Comparison of the Drinking Water Sector. Discussion Papers 07-32. University of Leuven.

Estache, Antonio y Martín Rossi (2005). Relevance of reforms, institutions and basic economics for the economic efficiency of African water utilities. Policy Research Working Paper . The World Bank, June.

Farsi, Mehdi, Aurelio Fetz y Massimo Filippini (2007). Benchmarking and Regulation in the Electricity Distribution Sector. CEPE Working Paper N° 54. Swiss Federal Institutes of Technology. January.

Farsi, Mehdi, Aurelio Fetz y Massimo Filippini (2008). Economies of Scale and Scope in Multi-Utilities. The Energy Journal. October. The International Association for Energy Economics.

Filippini, Massimo, Nevenka Hrovatin y Jelena Zoric (2008). Cost Efficiency and Economies of Scale of Slovenian Water Distribution Utilities: An Application of Panel Data Sthocastic Frontier Methods. Journal of Productivity Analysis. Vol 29, Issue 2 (April), pp. 169-182.

Fraquelli, Giovanni, Massimiliano Piacenza y Davide Vannoni (2002). Scope and Scale Economies in Multi-Utilities: Evidence From Gas, Water and Electricity Combinations. XIV Conferenza Società Italiana di Economia Pubblica. Dipartamento di Economia Pubblica e Territoriale. Università di Pavia.

Fraquelli, Giovanni, Massimiliano Piacenza y Davide Vannoni (2004). Cost savings from generation and distribution with an application to Italina electric utilities. Mimeo.

Fraquelli, Giovanni y Valentina Moiso (2005). Cost Efficiency and Economies of Scale in the Italian Water Industry. XVII Conferenza Società Italiana di Economia Pubblica. Dipartamento di Economia Pubblica e Territoriale. Università di Pavia.

Frone, Simona (2008). Factors and challenges of regionalization in the water and wastewater sector. Institute of National Economy. Romanian Academy.

Garcia, S., M. Moreaux y A. Reynaud (2007). Measuring Economies of Vertical Integration in Network Industries: An Application to the Water Sector. International Journal of Industrial Organization 25(4), 791-820.

Garcia, Serge y Alban Thomas (2001). “The Structure of Municipal Water Supply Costs: Application to a Panel of French Local Communities.” Journal of Productivity Analysis 16: 5-29.

González Gómez, Francisco y Miguel García Rubio (2008). Efficiency in the management of urban water services: What have we learned after four decades of research?. Hacienda Pública Española/ Revista de Economía Pública, 185-(2/2008). Instituto de Estudios Fiscales.

Hayes, K. (1987). “Cost structure of the water utility industry”. Applied economics, 19(3).

Hempling, Scott (2009). Multi-Utility Issues at a Glance. National Regulatory Research Institute. March 1, 09-04. Houtsma, John (2003). Water Supply in California: Economies of Scale, Water Charges, Efficiency, and Privatization. ERSA 2003 Congress, August.

Hunt, L.C. y Lynk, E.L. (1995). “Privatisation and Economic Efficiency in the UK Water Industry”. Oxford Bulletin of Economics and Statistics, 57(3).

Iimi, Atsushi (2008). (Un)Bundling Public-Private Partnership Contracts in the Water Sector: Competition in Auctions and Economies of Scale in Operation. Policy Research Working Paper 4459. The World Bank, January.

Kim, H. Y. y R. M. Clark (1988). Economies of Scale and Scope in Water Supply. Regional Science and Urban Economics 18, 479-502.

Kim, E. y Lee, H. (1998). “Spatial Integration of Urban Water Services and Economies of Scale”. Review of Urban and Regional Development Studies, 10(1).

McFadden, D. (1978). Cost, Revenue, and Profit Functions. Production Economics: A Dual Approach to Theory and Applications. Volume I: The Theory of Production.

Martins, R., F. Coelho y A. Fortunato (2006 a). Evaluating Cost Structure of Portuguese Water Utilities: Economies of Scale and Water Losses. Presented at the XVI International Reser Conference, Lisbon, September, 28-30.

Martins, R., F. Coelho y A. Fortunato (2006 b). “Cost Structure of the Portuguese Water Industry: a Cubic Cost Function Application”, Estudos do GEMF Nº 9/2006 Grupo de Estudos Monetários e Financeiros (GEMF) - Faculdade de Economia da Universidade de Coimbra.

Mizutani, F. y T. Urakami (2001). “Identifying network density and scale economies for Japanese water supply organizations”. Regional Science, volume 80.

Nauges, Céline y Caroline van den Berg (2007). How “natural” are natural monopolies in the water supply and sewerage sector? Case studies from developing and transition economies. Policy Research Working Paper 4137 4137. The World Bank, February.

Nauges, Céline y Caroline van den Berg (2008). “Spatial heterogeneity in the cost structure of water and sanitation services: A cross-country comparison of conditions for scale economies”. 16th EAERE Conference, Gothenburg: June.

Nerlove, Marc (1963). Returns to Scale in Electricity Supply. En “Measurement in Economics- Studies in Mathematical Economics and Econometrics in Memory of Yehuda Grunfeld”, edited by Carl F. Christ. Stanford: Stanford University Press.

Oliveira, Hugo de (2008). Fronteiras Eficientes de Custos e de Producao. Workshop ARSESP sobre Temas Regulatorios. Julho.

Piacenza, Massimiliano y Davide Vannoni (2005). Vertical and Horizontal Economies in the Electric Utility Industry: An Integrated Approach. Higher Education Research on Mobility Regulation and the Economics of Local Services. Working Paper 1. Fondazione Collegio Carlo Alberto. Torino.

Piacenza Massimiliano y Davide Vannoni (2004). Choosing among alternative cost function specifications: An application to Italian multi-utilities. Economics Letters: vol 82, 415.

Picazo Tadeo, Andrés, Francisco Sáez Fernández y Francisco Gonzalez Gómez (2008). Assesing performance in the management of the urban water cycle. Efficiency Series Working Paper 01/2008. Departamento de Economía, Universidad de Oviedo.

Renzetti, S. (1999). Municipal Water Supply and Sewage Treatment: Costs, Prices, and Distortions. The Canadian Journal of Economics, Vol 32, No 3.

Revollo Fernández, Daniel y Giovanna Londoño (2008). Análisis de economías de escala y alcance en los servicios de acueducto y alcantarillado en Colombia. Comisión de Regulación de Agua Potable y Saneamiento Básico (CRA). Congreso de Economía, 50 Años CEDE. Universidad de Los Andes, Bogotá, octubre.

Saal, D. y D. Parker, D. (2005). Assessing the performance of water operations in the English and Welsh Water industry: A panel input distance function approach. Aston Business School Working Paper RP0502.

Sauer, J. (2005). Economies of scale and firm size optimum in rural water supply. Water Resources Research 41.

Shih, Jhih-Shyang, Winston Harrington, William Pizer y Kenneth Gillinham (2004). Economies of scale and technical efficiency in community water systems. Resources for the Future. Discussion Paper 04-15. February.

Stone and Webster Consultants (2004). Investigation into evidence for economies of scale in the water and sewerage industry in England and Wales. Prepared for OFWAT. Final Report, January.

Torres, M. y C. J. Morrison-Paul (2006). “Driving Forces for Consolidation or Fragmentation of the US Water Utility Industry: A Cost Function Approach with Endogenous Output”. Journal of Urban Economics 59.

Tynan, Nicola y Bill Kingdom (2005). Optimal Size for Utilities? Public Policy For the Private Sector. Note Number 283. The World Bank, January.

Van den Berg, Caroline (2008). Performance assessment and benchmarking. IBNET as a tool for utility management and policy decisionmakers. Presentation. The International Benchmarking Network for Water and Sanitation Utilities. November 24.

Von Ginneken, Meike y Bill Kingdom (2008). Key topics in public water utility reform. Water Working Notes N° 17. The World Bank, August.

Von Hirschhausen, Christian, Astrid Cullmann, Matthias Walter, Rober Wand y Michael Zschille (2008). Quo vadis efficiency analysis of water distribution? A comparative literature review. Water Economics Working Paper 03. Technische Universitat Dresden. Chair in Energy Economics and Public Sector Management.