Subjects in collective action experiments like the voluntary contribution mechanism (Davis and Holt, 1993) display varying predispositions ranging from stronger or weaker inclinations to cooperate (including willingness to engage in costly punishment of non-cooperators) to relatively...

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. 10 Each team in our experiment comes from a different fishing boat at Lake Victoria, Tanzania. The provision of a norm-nudge is...