Extended Data Fig. 2: Cooperation, trust, and fairness surge when players are free to act differently with neighbours, often within the first round of the game.
From: Social networking agency and prosociality are inextricably linked in economic games
The figure depicts the temporal evolution of six variables across three games, each dataset representing the average of three replicates. The average and the 95% confidence bands of a time series model fitted to the data are also displayed (Extended Data Tables 1 and 2). (a) In the prisoner’s dilemma, the cooperation frequency shows a downtrend in the control group, a slight downtrend in mixed population treatments, and a slight uptrend in the free-player population treatment. (b) In the trust game, the entrusted amount exhibits a slight downtrend in the control and treatments with low and high densities of free players but a slight uptrend in the treatment with a medium density of free players and in the free-player population treatment. The returned amount shows a slight downtrend across both the control and all treatments. (c) In the ultimatum game, the proposed, accepted, and rejected amounts show a downtrend in control and across all treatments.
