Bernhard Kittel is a professor of economic sociology at the University of Vienna, Austria. His research focuses on distributive justice attitudes and behaviour, and group decision making. He is co-editor, with Stefan Traub, of “Need-based Distributive Justice. An Interdisciplinary Perspective” (Springer 2020). Further research areas cover aspects of labour markets and welfare states, in particular labour market participation of young people, refugees, and marginalized groups. He has been a principal investigator of the interdisciplinary research group “Need-based justice and distribution procedures”. Recent papers have been published, i.a., in PLoS One, Experimental Economics, Social Science Research, Journal of Behavioral and Experimental Economics, and The ANNALS of the American Academy of Political and Social Science.  Stefan Traub is a professor of behavioral economics at Helmut-Schmidt University Hamburg, Germany. His research focuses on individual and group decision-making, social preferences, and the provision of public goods. He is co-editor, with Bernhard Kittel, of “Need-based Distributive Justice. An Interdisciplinary Perspective” (Springer 2020). He has been the spokesperson of the interdisciplinary research group “Need-based justice and distribution procedures” funded by the German Research Foundation (DFG). Recent papers have been published in the Journal of Public Economics, Games and Economic Behavior, European Economic Review, and Journal of Economic Behavior and Organization.