A linear public good experiment adopted from Holt and Laury [1997. Classroom games: Voluntary provision of a public good. Journal of Economic Perspectives, 11(4), 209–215.] has been employed to investigate strategic behaviour in pollution abatement among African climate decision-makers. The experiment consisted of three groups, of which groups 2 and 3 received one and two treatments, respectively.

Abstract: Common identity and peer punishment have been identified as crucial means to reduce free riding and promote cooperation in teams. This paper examines the relative importance of these two mechanisms under two income distributions in team cooperation. In a repeated public good experiment, we use different combinations of homogeneous/heterogeneous endowments, strong/weak identity, and absence/presence of peer punishment.