社会孤立引发的负面情绪影响经济行为：一项自然实验研究

Social isolation policies, often implemented during major public health or social crises, can exert profound effects on both mental health and economic behavior. This study exploits an abrupt campus-wide restriction on in-person interactions as a natural experiment to examine the consequences of prolonged isolation among young adults. Using both within-subject and between-subject analyses, we find that extended separation from normal social life significantly heightens negative emotions, which in turn partially mediate a decline in cooperative behavior and a rise in antisocial tendencies. Specifically, cooperation decreased by 25.2% and antisocial punishment rose by 86.2% after eight weeks of enforced isolation. These findings highlight the necessity of accounting for the psychological consequences of isolation policies when evaluating their broader societal impacts.