Fig. 2
The time trend of the voluntary PD games: The red, blue, and green bars express the ratio of defection, cooperation and loner, respectively. Panel A shows simultaneous games and panel B shows alternating games.
Fig. 2 | Scientific Reports
The time trend of the voluntary PD games: The red, blue, and green bars express the ratio of defection, cooperation and loner, respectively. Panel A shows simultaneous games and panel B shows alternating games.
