Peter J. Taylor is a Fellow of the British Academy and of the UK Academy of Social Sciences, and Founder of the Globalization and World Cities research network (GaWC), He is Emeritus Professor of Geography at both Loughborough and Northumbria Universities.Michael Barke is the Hon Librarian, Executive Committee and Council Member of the Society of Antiquaries of Newcastle upon Tyne (established 1813) based at the Great North Museum: Hancock in Newcastle upon Tyne.Zachary P. Neal is a Professor of Psychology at Michigan State University. He is also a member of the Board of Directors of the International Network for Social Network Analysis and chairs their Working Group on Data Sharing.