Fig. 2: Investment into climate change mitigation.
From: Economic experiments support Ostrom’s polycentric approach to mitigating climate change
a Contribution per player of 9 players per group investing individually during each of 10 rounds (T1). Stippled line shows fair share of €2. b Contribution per player of 9 players per group subdivided into 3 fixed subgroups of 3 players investing individually in mitigation during each of 10 rounds with an incentive to save energy, benefiting own subgroup (T2). c Percentage of subgroups per group investing the sub-target of €60, for randomly simulated subgroups of 3 players in T1 (grey) and in T2 (orange). d Euros invested per group towards the global collective target of €180 (stippled line), for T1 (grey) and T2 (orange). e Selfish (€0), fair (€2) and generous (€4) contributions per player per round for randomly simulated subgroups investing without incentive (grey), and for fixed subgroups with incentive (orange). f Selfish (0€) contributions per player in each round for randomly simulated subgroups in T1 (grey) and for the fixed subgroups in T2 (orange). See text for statistics, bars indicate standard errors.
