Gunter Lösel, Ph.D. (Switzerland): Director of Performative Practice, Zurich University of the Arts and Artistic Director of Improtheater Bremen in Germany (http://www.improtheater-bremen.de/). He has published several books on improvisational theatre and a PhD dissertation on the performativity of improvisation: Das Spiel mit dem Chaos – Performativität und Systemcharakter des Improvisationstheaters (2013), Bielefeld: transcript-Verlag.