Profit, productivity and price performance changes in the water and sewerage industry: an empirical application for England and Wales

This paper aims to analyse the impact of regulation in the financial performance of the Water and Sewerage companies (WaSCs) in England and Wales over the period 1991–2008. In doing so, a panel index approach is applied across WaSCs over time to decompose unit-specific index number-based profitability growth as a function of the profitability, productivity and price performance growth achieved by benchmark firms, and the catch up to the benchmark firm achieved by less productive firms. The results indicated that after 2000 there is a steady decline in average price performance, while productivity improves resulting in a relatively stable economic profitability. It is suggested that the English and Welsh water regulator is now more focused on passing productivity benefits to consumers, and maintaining stable profitability than it was in earlier regulatory periods. This technique is of great interest for regulators to evaluate the effectiveness of regulation and companies to identify the determinants of profit change and improve future performance, even if sample sizes are limited.

[1]  M. Tretheway.  Comparing Total Factor Productivity and Price Performance , 2016 .

[2]  R. Hill.  Measuring Price Differences Across Countries and Time in the European Union , 2002 .

[3]  Robert J. Hill,et al.  Constructing Price Indexes across Space and Time: The Case of the European Union , 2004 .

[4]  Timothy Coelli,et al.  An Introduction to Efficiency and Productivity Analysis , 1997 .

[5]  Rui Cunha Marques,et al.  Estimating Size and Scope Economies in the Portuguese Water Sector Using the Most Appropriate Functional Form , 2015 .

[6]  R. Lipsey,et al.  International and Interarea Comparisons of Income, Output, and Prices , 2000 .

[7]  Bert M. Balk,et al.  The Residual: On Monitoring and Benchmarking Firms, Industries, and Economies with Respect to Productivity , 2001 .

[8]  Kevin J. Fox,et al.  The contributions of productivity, price changes and firm size to profitability , 2006 .

[9]  Rui Cunha Marques,et al.  Comparing private and public performance of Portuguese water services , 2008 .

[10]  Paolo Pierani.  Multilateral comparison of total factor productivity and convergence in Italian agriculture (1951-2002) , 2009 .

[11]  R. Sala-Garrido,et al.  Benchmarking in wastewater treatment plants: a tool to save operational costs , 2013, Clean Technologies and Environmental Policy.

[12]  D. Edelman,et al.  Latin American trends in urban environmental management , 2003 .

[13]  Alexandros Maziotis,et al.  Regulatory Price Performance, Excess Cost Indexes and Profitability: How Effective is Price Cap Regulation in the Water Industry? , 2009 .

[14]  Pedro Simões,et al.  Influence of regulation on the productivity of waste utilities. What can we learn with the Portuguese experience? , 2012, Waste management.

[15]  Dong-Shang Chang,et al.  Incorporating the carbon footprint to measure industry context and energy consumption effect on environmental performance of business operations , 2015, Clean Technologies and Environmental Policy.

[16]  W. Diewert,et al.  Axiomatic and Economic Approaches to International Comparisons , 1996 .

[17]  Emmanuel Thanassoulis,et al.  Productivity change in the water industry in England and Wales: application of the meta-Malmquist index , 2011, J. Oper. Res. Soc..

[18]  Kevin J. Fox,et al.  Property Rights in a Fishery: Regulatory Change and Firm Performance , 2003 .

[19]  J. Salerian.  Analysing the Performance of Firms Using a Decomposable Ideal Index Number to Link Profit, Prices and Productivity , 2003 .

[20]  V. Elton Ball,et al.  Agricultural productivity : measurement and sources of growth , 2002 .

[21]  V. E. Ball,et al.  U.S. Agriculture, 1960-96 A Multilateral Comparison of Total Factor Productivity , 2001 .

[22]  V. E. Ball,et al.  Transitive Multilateral Comparisons of Agricultural Output, Input, and Productivity: A Nonparametric Approach , 2002 .

[23]  L. Trujillo,et al.  Efficiency effects of “privatization” in Argentina’s water and sanitation services , 2003 .

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

[25]  Alexandros Maziotis,et al.  The Luenberger productivity indicator in the water industry: An empirical analysis for England and Wales , 2014 .

[26]  Pedro Simões,et al.  Performance Benchmarking in Utility Regulation: the Worldwide Experience , 2011 .

[27]  Bert M. Balk,et al.  Price and Quantity Index Numbers: Models for Measuring Aggregate Change and Difference , 2012 .

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

[29]  Kristiaan Kerstens,et al.  Technology-Based Total Factor Productivity and Benchmarking: New Proposals and an Application , 2011 .

[30]  Alexandros Maziotis,et al.  Output Quality and Sources of Profit Change in the English and Welsh Water and Sewerage Companies , 2012 .