Trust as a social norm? A lab-in-the-field experiment with refugees in Switzerland / Stefanie S. Baumgartner (University of Fribourg), Fabio Galeotti (CNRS, Université Lumière Lyon, Emlyon Business School, Université Jean-Monnet Saint-Etienne and GATE), Thierry Madiès (University of Fribourg), Marie Claire Villeval (CNRS, Université Lumière Lyon 2, Emlyonbusiness school, Université Jean-MonnetSaint-Etienne, GATE and IZA) ; IZA Institute of Labor Economics