... method for benchmarking the efficiency of water utilities is very relevant for water regulators because it affects decision making process such as water tariffs and design incentives to improve the performance and quality of service of water utilities. Originality/value This paper evaluates...

... from an economic, operational and environmental perspective. It also investigates more complex modelling approaches which have been undertaken to gain greater insight into an airport's overall performance. In addition an assessment is made of the role of benchmarking in airport regulation. Findings...