Leaders’ cooperation is more influential in promoting group members’ cooperation in the next round, compared to peers’ behaviors in peer punishment institutions.

Leaders’ cooperation is more influential in promoting group members’ cooperation in the next round, compared to peers’ behaviors in peer punishment institutions.相较于同伴惩罚机制（peer punishment institutions）中的同伴行为，领导者的合作行为对推动群体成员在下一回合的合作更具影响力。