Juan Montero is Professor of Regulation at the Law School of UNED University, Madrid, Spain; part-time Professor at the European University Institute in Florence, Italy, in the Florence School of Regulation; and of counsel in MLAB. Matthias Finger is Professor Emeritus from Ecole Polytechnique Fédérale in Lausanne, Switzerland (EPFL); part-time Professor at the European University Institute in Florence, Italy, where he directs the Florence School of Regulation’s Transport Area; and Professor at the Faculty of Management at Istanbul Technical University (ITÜ).