With the help of a repeated matching pennies game, we model a situation in which one of two players may accidentally get into an adverse situation that the other player can take advantage of. In doing so, we vary the degree of uncertainty about future rounds and especially about the frequency and role distribution of situations in which fairness and positive reciprocity are possible. It turns out that uncertainty can greatly increase the number of fair moves when unfair behavior leads to a loss of efficiency. If there is no loss of efficiency and if unfairness only leads to a redistribution between players, we observe almost exclusively selfish behavior. We also vary the social distance and find that small distance leads to a significant increase in the proportion of fair moves even in games where there is no loss of efficiency.

在重复匹配便士游戏的帮助下，我们模拟了一种情况，其中两个玩家中的一个可能会意外地陷入另一个玩家可以利用的不利情况。在这样做的过程中，我们改变了未来轮次的不确定性程度，尤其是公平和积极互惠可能出现的情况的频率和角色分布。事实证明，当不公平行为导致效率损失时，不确定性会大大增加公平举措的数量。如果没有效率损失，如果不公平只会导致玩家之间的重新分配，我们几乎完全观察到自私行为。我们还改变了社交距离，发现即使在没有效率损失的游戏中，小距离也会导致公平移动的比例显着增加。