Charles Efferson - Arbitrary Cooperation Doruk Iris - Normative Expectations of Reciprocal Negotiators Joris Schröder - Cooperating Beyond Group Boundaries: Behavioural Principles and Interventions Irene Mussio - Finding collaborative solutions to address water shortages in farming areas in the Mekong Delta: a behavioural approach Rati Mekvabishvili - Intelligence and the Dynamics of Free Riding in Public Good Experiments