%0 Generic %A Diekert, Florian %A Eymess, Tillmann %C Heidelberg %D 2021 %F heidok:31120 %K collective action, team decisions, norm-nudges, common pool resources %R 10.11588/heidok.00031120 %T Changing Collective Action: Norm-Nudges and Team Decisions %U https://archiv.ub.uni-heidelberg.de/volltextserver/31120/ %V 0709 %X 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.