Paul Chiambaretto, PhD., is a Professor of Strategy and Marketing at Montpellier Business School and Associate Researcher at Ecole Polytechnique. His main research topics are inter-organizational relationships (such as alliances, alliance portfolios and coopetition) and branding strategies. He has developed a strong expertise on air and rail transportation industries. His research has been published in ranked journals such as Industrial Marketing Management, International Studies of Management and Organization, Long Range Planning, M@n@gement, Management International, etc. He has been a visiting researcher in several foreign institutions such as University of Oxford, Concordia University and Umea University.