This paper surveys the literature on scale and scope economies in the water and sewerage
industry. The magnitude of scale and scope economies determines the cost efficient …

Productivity analyses focus on either efficiency or effectiveness. This paper provides a step-
wise approach for evaluating utility performance. In a first step, utilities' technical efficiency is …

The water industry faces the challenge of implementing privatization reforms. This process
mainly adopts the following two approaches: the privatization of public water and sewerage …

Efficiency assessment is a valuable tool for industries that are regulated, such as the
provision of drinking water. Hence, past research on this topic is wide. However, current …

Enhancing the energy performance of water utilities is a critical step towards achieving a net-
zero carbon industry. Traditional energy performance assessments in the water industry …

We innovate in the field of water companies' performance with an application of the
directional distance function and the Luenberger productivity indicator (LPI) to the …

Reducing greenhouse gas emissions is a major challenge faced by cities seeking to
improve their environmental sustainability. Doing so requires a good understanding of the …

In recent years, England and Wales have suffered droughts. This unusual situation defies
the common belief that the British climate provides abundant water resources and has …

Improving the cost efficiency and quality of service across time corresponds to two important
targets for regulated water companies. Following a pioneering approach, we have evaluated …

The assessment of productivity change over time and its drivers is of great significance for
water companies and regulators when setting urban water tariffs. This issue is even more …