Nigel Halpern is Professor of Air Transport and Tourism Management with the Department of Marketing at Kristiania University College in Oslo, Norway. He has previously worked for Molde University College; the Centre for Civil Aviation at London Metropolitan University; the UK Department for Transport, Local Government and the Regions; the UK Civil Aviation Authority; and PGL Travel. Nigel teaches and conducts research and consultancy in air transport and tourism management. Airport marketing is his main area of interest. He has a PhD in airport marketing from the Centre for Air Transport Management at Cranfield University, and he has published widely on the subject in leading textbooks and academic and professional journals, including with books on Airport Marketing and The Routledge Companion to Air Transport Management. Anne Graham is Professor of Air Transport and Tourism Management at the University of Westminster in London, UK. One of her key areas of expertise and knowledge is airport management, economics and regulation, and she has over 30 years’ experience of teaching, research and consultancy on these topics. She has published widely with recent books including Managing Airports (5th edition), The Routledge Companion to Air Transport Management, Airport Finance and Investment in the Global Economy, and Aviation Economics. She is also a co-editor of three linked books published by Routledge in 2021 related to air transport and regional development. She is a former Editor-in-Chief of the Journal of Air Transport Management.