Anne Graham is a professor of air transport and tourism management at the University of Westminster, UK. She has two main research areas: first, airport management, economics and regulation, and, second, the relationship between the tourism sector and the aviation sector. She has published widely, recent books including Air Transport: A Tourism Perspective, Airport Finance and Investment in the Global Economy, Managing Airports: An International Perspective, The Routledge Companion to Air Transport Management and Airport Marketing. She is a previous editor-in-chief of the Journal of Air Transport Management and in 2016 was made a fellow of the Air Transport Research Society.

Nicole Adler is a full professor and the head of the department of operations research and operations management at the School of Business Administration of Hebrew University in Jerusalem. Her major research interests include game theory and productivity estimation applied to the field of transportation. Her work has analysed hub-and-spoke airline competition and mergers, public service obligation tenders and airport productivity, and recently, she has utilised game theoretic concepts to understand air traffic control markets. Nicole is currently an associate editor for Transportation Research Part B: Methodological.

Hans-Martin Niemeier is a director of the Institute for Transport and Development at Bremen University of Applied Sciences. He is the chairman of the German Aviation Research Society and member of the Advisory Board of the European Aviation Conference. He chaired the ATARD COST Action from 2016 to 2019. From 2014 to May 2019, he was a member of the Performance Review Body of the Single European Sky. He has published on privatisation, regulation and competition of airports, on the reform of slot allocation and on airline and airport alliances.

Ofelia Betancor is an associate professor of economics in the department of applied economics at the University of Las Palmas de Gran Canaria (Spain). She holds a Master of Science in Economics from the University of London, and two doctorate degrees in economics (Institute for Transport Studies-University of Leeds and University of Las Palmas). She has participated in many research projects at the national level and international level, and has collaborated with the World Bank and the Inter-American Development Bank as a specialist in air transport and the economic evaluation of projects and transport policies. The results of her works have been published in leading journals in the area of transport economics.

António Pais Antunes is a professor in the department of civil engineering at the University of Coimbra (Portugal). He has been a visiting fellow at Princeton University, an invited professor at EPF Lausanne, a visiting professor at the Massachusetts Institute of Technology (MIT) and a visiting researcher at the University of Bergamo. His teaching and research focus on public facility location, urban mobility (notably public transport and vehicle sharing), and air transport planning. He currently acts as deputy director of CITTA (Research Centre for Territory Transport and Environment) and as a coordinator of the doctoral programmes in spatial planning and in transport systems at the University of Coimbra.

Volodymyr Bilotkach is a senior lecturer in economics at the Singapore Institute of Technology. His research interests cover various issues in economics of the aviation sector, including airline alliances and mergers, airport regulation and the economics of distribution of airline tickets.

Enrique J. Calderón is a retired professor from the department of transport and territorial planning in the Polytechnic University of Madrid, Spain. He specialises in urban, regional and environmental issues at all levels, sustainability assessment and the integration of environmental concerns into government policies and programmes, notably in regard to transportation

Gianmaria Martini is a full professor of applied economics at the University of Bergamo, Italy. His research interests are applied econometrics and methods to estimate efficiency in the air transport sector, extended to environmental issues. Recent research activities have covered regional development and aviation, with a specific focus on African countries. He is currently an associate editor of the Journal of Air Transport Management and was the chairman of the Organising Committee of the 2013 ATRS Conference in Bergamo. He was nominated as vice president for publications of the Air Transport Research Society.

1. Introduction. 2. Measuring the quality of air transport networks - a topology of connectivity and accessibility metrics. 3. The Airport Dependency Index. 4. Changing Governance and Regulation of Airports - The Regional Aspect. 5. Air traffic control policy framework advancements vis-a-vis regional airports. 6. A comparative analysis of policies to support air connectivity in remote regions. 7. Aviation subsidies in Europe and regional development. 8. Subsidies to promote air transport connectivity when carriers have market power: Passenger-based policies versus route-based policies. 9. Public service obligations in air transport: The situation in the UK. 10. Aviation Guidelines 2014 and the strategies of member countries. 11. State aid to low-cost airlines: Worthwhile if durable? 12. Towards a method to assess the role of online marketing campaigns in the airline - airport - destination authority triangular business relationship: The case of Athens tourism partnership. 13. A case study of the politics of airport construction: The new Berlin airport. 14. The impact of passenger taxes: The UK Air Passenger Duty case. 15. Noise assessment of local airports: The case of Milan-Bergamo.