Figure 1
From: The role of institutional incentives and the exemplar in promoting cooperation
Average contribution per round for institutional incentives compared to Control (Ctrl).
Panels (a), (b) and (c) show the results in the three schemes Const, Up and Down, respectively. The data is analyzed at the level of the group (i.e. average group contribution per capita) to avoid interdependence of outcomes for members of a given group. The average contribution per session (i.e. over all 50 rounds) are: 7.55 ± 4.65 in Control; IRP 15.23 ± 2.08, IP 10.79 ± 4.65 and IR 8.95 ± 2.08 in Const; IRP 17.69 ± 1.64, IP 12.55 ± 4.25 and IR 9.18 ± 2.85 in Up; IRP 15.52 ± 2.20, IP 11.80 ± 4.35 and IR 8.32 ± 2.34 in Down.
