Pontificia Universidad Católica de Chile Pontificia Universidad Católica de Chile

Changes in the total costs of the English and Welsh water and sewerage industry: The decomposed effect of price and quantity inputs on efficiency

Revista : Utilities Policy
Volumen : 66
Páginas : 101063
Tipo de publicación : ISI Ir a publicación


Understanding what drives changes in regulated water companies’ costs is of great relevance to water regulators. This study decomposes and estimates the change in total costs for a sample of ten water and sewerage companies in England and Wales from 1993 to 2016. The results demonstrate that companies’ total costs increased over time due to increases in input prices and input quantity. Any gains obtained from the efficient allocation of resources and technical progress were lost due to mergers and technical inefficiency. Finally, we link our results with the regulatory cycle to evaluate the impact of the regulatory regime on companies’ costs and discuss some policy implications.