Quo vadis efficiency analysis of water distribution? A comparative literature review

Recognizing the growing importance of scientific benchmarking in water distribution, we provide a comprehensive survey of the available literature. We begin with a discussion about the (limited) use of benchmarking in the regulation of UK water utilities, and then extend the analysis to regulated water sectors in other countries. We find no clear impact of public or private ownership; instead, the institutional settings appear to be a dominant driver of efficiency. Quality and structural variables are significant parameters; and water losses and population density are also important drivers. Analysis reveals that economies of scale only exist in fragmented water industries, whereas economies of density are omnipresent. We find evidence suggesting important economies of scope (e.g. between water and sewerage). Finally, we summarize the tensions that exist in attempting to measure efficiency in the water industry and draw conclusions about how to improve efficiency analysis in the future.

[1]  Emmanuel Thanassoulis,et al.  The use of data envelopment analysis in the regulation of UK water utilities: Water distribution , 2000, Eur. J. Oper. Res..

[2]  Lester C. Hunt,et al.  Privatisation and Efficiency in the UK Water Industry: An Empirical Analysis , 2009 .

[3]  G. Battese,et al.  A model for technical inefficiency effects in a stochastic frontier production function for panel data , 1995 .

[4]  Arnaud Reynaud,et al.  Measuring Economies of Vertical Integration in Network Industries: An Application to the Water Sector , 2007 .

[5]  I. García‐Sánchez,et al.  Efficiency Measurement in Spanish Local Government: The Case of Municipal Water Services , 2006 .

[6]  Antonio Estache,et al.  Efficiency Effects of 'Privatization' in Argentina's Water and Sanitation Services , 2003 .

[7]  Giovanni Fraquelli,et al.  Scope and scale economies in multi-utilities: evidence from gas, water and electricity combinations , 2004 .

[8]  A. Estache,et al.  How Different Is the Efficiency of Public and Private Water Companies in Asia , 2002 .

[9]  John Cubbin,et al.  Regression versus data envelopment analysis for efficiency measurement: an application to the England and Wales regulated water industry , 1998 .

[10]  Massimo Filippini,et al.  Cost efficiency of Slovenian water distribution utilities: an application of stochastic frontier methods , 2008 .

[11]  Timothy Coelli,et al.  Performance Measurement And Regulation of Network Utilities , 2007 .

[12]  S. Berg,et al.  Benchmarking Central American Water Utilities , 2009 .

[13]  Christian A. Ruzzier,et al.  The Case for International Coordination of Electricity Regulation: Evidence from the Measurement of Efficiency in South America , 2002 .

[14]  Winston Harrington,et al.  Economies of Scale and Technical Efficiency in Community Water Systems , 2004 .

[15]  Céline Nauges,et al.  Economies of density, scale and scope in the water supply and sewerage sector: a study of four developing and transition economies , 2008 .

[16]  John Cubbin.  Efficiency in the water industry , 2005 .

[17]  Takuya Urakami,et al.  Identifying network density and scale economies for Japanese water supply organizations , 2001 .

[18]  Robert M. Clark,et al.  Economies of scale and scope in water supply , 1988 .

[19]  C. Kirkpatrick,et al.  An Empirical Analysis of State and Private-Sector Provision of Water Services in Africa. , 2006 .

[20]  S. Kumbhakar,et al.  Efficiency measurement using a latent class stochastic frontier model , 2004 .

[21]  Massimo Filippini,et al.  The use of a variable cost function in the regulation of the Italian water industry , 2001 .

[22]  T. Coelli,et al.  A Primer on Efficiency Measurement for Utilities and Transport Regulators , 2003 .

[23]  Rangesan Narayanan,et al.  Specification and estimation of the effect of ownership on the economic efficiency of the water utilities , 1995 .

[24]  Maria A. Garcia-Vali as,et al.  IS DEA USEFUL IN THE REGULATION OF WATER UTILITIES? A DYNAMIC EFFICIENCY EVALUATION , 2006 .

[25]  David Parker,et al.  The impact of privatization and regulation on the water and sewerage industry in England and Wales: a translog cost function model , 2000 .

[26]  David S. Saal,et al.  Determining the contribution of technical change, efficiency change and scale change to productivity growth in the privatized English and Welsh water and sewerage industry: 1985–2000 , 2007 .

[27]  David S. Saal,et al.  Methods and trends of performance benchmarking in UK utility regulation , 2006 .

[28]  Scott Reid,et al.  Estimating OPEX productivity growth in English and Welsh water and sewerage companies:1992-2003 , 2004 .

[29]  Davide Vannoni,et al.  Choosing among alternative cost function specifications: an application to Italian multi-utilities , 2004 .

[30]  W. Greene.  Fixed and Random Effects in Stochastic Frontier Models , 2002 .

[31]  Chen Lin,et al.  Consistency in performance rankings: the Peru water sector , 2008 .

[32]  Rui Cunha Marques,et al.  Performance-based Potable Water and seWer service regulation. the regulatory model * , 2007 .

[33]  Teofilo Ozuna,et al.  Can public sector reforms improve the efficiency of public water utilities? , 2002, Environment and Development Economics.

[34]  Emmanuel Thanassoulis,et al.  DEA and its use in the regulation of water companies , 2000, Eur. J. Oper. Res..

[35]  David Parker,et al.  Assessing the performance of water operations in the English and Welsh water industry:a lesson in the implications of inappropriately assuming a common frontier , 2006 .

[36]  William H. Greene,et al.  Reconsidering heterogeneity in panel data estimators of the stochastic frontier model , 2005 .

[37]  Andrés J. Picazo-Tadeo,et al.  Does service quality matter in measuring the performance of water utilities , 2008 .

[38]  Chen Lin,et al.  Service quality and prospects for benchmarking: Evidence from the Peru water sector , 2005 .

[39]  Marcelo Resende,et al.  Efficiency and regulatory issues in the Brazilian water and sewage sector: an empirical study , 2004 .

[40]  Alban Thomas,et al.  The Structure of Municipal Water Supply Costs: Application to a Panel of French Local Communities , 2001 .

[41]  C. Kirkpatrick,et al.  STATE VERSUS PRIVATE SECTOR PROVISION OF WATER SERVICES IN AFRICA: AN EMPIRICAL ANALYSIS , 2004 .

[42]  J. Stern.  UK regulatory price reviews and the role of efficiency estimates , 2005 .

[43]  Antonio Estache,et al.  Sector Organization, Governance, and the Inefficiency of African Water Utilities , 2002 .

[44]  M. García-valiñas,et al.  Is DEA useful in the regulation of water utilities? A dynamic efficiency evaluation (a dynamic efficiency evaluation of water utilities) , 2007 .

[45]  David S. Saal,et al.  Is a little sunshine all we need? On the impact of sunshine regulation on profits, productivity and prices in the Dutch drinking water sector , 2008 .

[46]  Massimo Filippini,et al.  Economies of Scale and Scope in Multi-Utilities , 2008 .

[47]  T. Coelli,et al.  Performance measurement in the Australian water supply industry: A preliminary analysis , 2005 .

[48]  S. Caudill,et al.  Frontier Estimation and Firm-Specific Inefficiency Measures in the Presence of Heteroscedasticity , 1995 .

[49]  Diane P. Dupont,et al.  Measuring the Technical Efficiency of Municipal Water Suppliers: The Role of Environmental Factors , 2009, Land Economics.

[50]  Maria Luisa Corton,et al.  Benchmarking in the Latin American water sector: The case of Peru. , 2003 .

[51]  Catherine J. Morrison Paul,et al.  Driving forces for consolidation or fragmentation of the US water utility industry: A cost function approach with endogenous output , 2006 .

[52]  Giovanni Fraquelli,et al.  Costs and Structure of Technology in the Italian Water Industry , 2000 .

[53]  A. Bottasso,et al.  Cost Inefficiency in the English and Welsh Water Industry: An Heteroskedastic Stochastic Cost Frontier Approach , 2003 .

[54]  Gordon Allan.  Assessing capital efficiency in the water and sewerage industry in England and Wales: Ofwat's approach , 2006 .

[55]  Klaus Frohberg,et al.  Allocative efficiency of rural water supply – a globally flexible SGM cost frontier , 2007 .