TY - GEN N2 - We test whether a descriptive norm-nudge is a suitable policy tool to increase cooperation in a social dilemma when decisions are taken by teams, not individuals. Each team in our experiment comes from a different fishing boat at Lake Victoria, Tanzania. The provision of a norm-nudge is randomized across two decision making mechanisms, enabling us to identify experience with egalitarian or hierarchical decision structures, both present at Lake Victoria. The descriptive norm-nudge increases cooperation by 14 and 16 percentage points for egalitarian and hierarchical team decisions, respectively. Captains from boats with hierarchical organization are particularly responsive. A1 - Diekert, Florian A1 - Eymess, Tillmann EP - 55 UR - https://archiv.ub.uni-heidelberg.de/volltextserver/31120/ ID - heidok31120 KW - collective action KW - team decisions KW - norm-nudges KW - common pool resources AV - public CY - Heidelberg TI - Changing Collective Action: Norm-Nudges and Team Decisions T3 - Discussion Paper Series / University of Heidelberg, Department of Economics Y1 - 2021/12// ER -