Economies of Scale and Scope in Network Industries: Lessons for the UK water and sewerage sectors

Many studies of the water and sewerage industries place significant importance on the benefits of economies of scale and scope and how these relate to vertically integrated firms. We have re-examined the early literature on scale and scope economies and find that these studies do not implicitly preclude non-integrated firms from fully utilising assets for multi-product activities; they can still reap scope economies through trading in the open market. Further, we demonstrate difficulties in separating these two types of economies when assessing firm performance. Trade-offs between governance and production costs are a key issue in determining the value of vertically integrated firms that may undergo divestiture. We discuss the present policy debate regarding the optimal structure of the water and sewerage markets in England and Wales in the light of this, and recommend avenues of research that will help determine the optimal policy.

[1]  David Saal.  Investigation into evidence for economies of scale in the water and sewerage industry in England and Wales: final report , 2004 .

[2]  W. Thompson.  World population and food supply. , 1960, Journal of the American Medical Association.

[3]  M. Perry.  Vertical integration: Determinants and effects , 1989 .

[4]  L. H..  The History of the Telephone in the United Kingdom , 1939, Nature.

[5]  Robert E. Babe.  Vertical Integration and Productivity: Canadian Telecommunications , 1981 .

[6]  Thomas P. Hughes,et al.  Networks Of Power , 1983 .

[7]  Bruce Cohen,et al.  Productivity and efficiency in the water industry , 2009 .

[8]  M. Abbott,et al.  The long term reform of the water and wastewater industry: the case of Melbourne in Australia , 2011 .

[9]  H. Stanley,et al.  On the Size Distribution of Business Firms , 2008 .

[10]  O. Williamson,et al.  Markets and Hierarchies: Analysis and Antitrust Implications. , 1977 .

[11]  Martin Cave,et al.  Independent review of competition and innovation in water markets : final report , 2009 .

[12]  John E. Kwoka,et al.  Restructuring the U.S. Electric Power Sector: A Review of Recent Studies , 2008 .

[13]  Michael G. Pollitt,et al.  The arguments for and against ownership unbundling of energy transmission networks , 2008 .

[14]  Richard Ma.  Water Act 1989 , 1989 .

[15]  Robert D. Willig,et al.  Multiproduct Technology and Market Structure , 1979 .

[16]  T. P. Hughes,et al.  Networks of Power: Electrification in Western Society , 1984 .

[17]  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 .

[18]  A. S. Pabla.  Electric Power Distribution , 2000 .

[19]  W. Dugger.  The Economic Institutions of Capitalism , 1987 .

[20]  Paolo Leon.  The Economic Institutions of Capitalism , 1986, The Antitrust Bulletin.

[21]  B. Gilland.  World population and food supply: can food production keep pace with population growth in the next half-century? , 2002 .

[22]  Robert Bacon,et al.  Public policy for the private sector , 1995 .

[23]  William F. Fox,et al.  Using Homothetic Composed Error Frontiers to Measure Water Utility Efficiency , 1986 .

[24]  D. Newbery,et al.  The restructuring and privatisation of Britain's CEGB--was it worth it? , 2003 .

[25]  M. Knapp,et al.  Economics of scale in sewage purification and disposal. , 1978, The Journal of industrial economics.

[26]  T. P. Hughes,et al.  Networks of Power: Electrification in Western Society, 1880-1930 , 1984 .

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

[28]  D. Teece.  ECONOMIES OF SCOPE AND THE SCOPE OF THE ENTERPRISE , 1980 .

[29]  David T. Levy,et al.  Testing Stigler's Interpretation of "The Division of Labor Is Limited by the Extent of the Market." , 1984 .

[30]  Andrea Shepard,et al.  Firm Diversification and CEO Compensation: Managerial Ability or Executive Entrenchment? , 1994 .

[31]  A. Shleifer,et al.  A Theory of Yardstick Competition , 1985 .

[32]  Paul Nillesen,et al.  Using Regulatory Benchmarking Techniques to Set Company Performance Targets: The Case of US Electricity , 2010 .

[33]  F. Scherer,et al.  The economics of multi-plant operation : an international comparisons study , 1976 .

[34]  G. Stigler.  The Division of Labor is Limited by the Extent of the Market , 1951, Journal of Political Economy.

[35]  Michael G. Pollitt,et al.  Divestiture policy and operating efficiency in U.S. electric power distribution , 2010 .

[36]  John C. Panzar,et al.  Economies of Scale in Multi-Output Production , 1977 .

[37]  Alexandros Maziotis,et al.  Scale and Scope Economies and the Efficient Vertical and Horizontal Configuration of the Water Industry: A Survey of the Literature , 2013 .

[38]  Donald Hay,et al.  The Efficiency of Firms: What Difference Does Competition Make? , 1997 .

[39]  Kathy J. Hayes.  Cost structure of the water utility industry , 1987 .