Capraro Valerio, Marcelletti Alessandra
Center for Mathematics and Computer Science (CWI), 1098 XG, Amsterdam, The Netherlands.
Department of Economics, University of Rome 'Tor Vergata', 00133, Roma, Italy.
Sci Rep. 2014 Dec 12;4:7470. doi: 10.1038/srep07470.
Actions such as sharing food and cooperating to reach a common goal have played a fundamental role in the evolution of human societies. Despite the importance of such good actions, little is known about if and how they can spread from person to person to person. For instance, does being recipient of an altruistic act increase your probability of being cooperative with a third party? We have conducted an experiment on Amazon Mechanical Turk to test this mechanism using economic games. We have measured willingness to be cooperative through a standard Prisoner's dilemma and willingness to act altruistically using a binary Dictator game. In the baseline treatments, the endowments needed to play were given by the experimenters, as usual; in the control treatments, they came from a good action made by someone else. Across four different comparisons and a total of 572 subjects, we have never found a significant increase of cooperation or altruism when the endowment came from a good action. We conclude that good actions do not necessarily inspire good actions in others. While this is consistent with the theoretical prediction, it challenges the majority of other experimental studies.
诸如分享食物以及为实现共同目标而合作等行为,在人类社会的进化过程中发挥了基础性作用。尽管此类善举十分重要,但对于它们能否以及如何在人与人之间传播,我们却知之甚少。例如,成为利他行为的接受者会增加你与第三方合作的可能性吗?我们在亚马逊土耳其机器人平台上进行了一项实验,利用经济博弈来测试这一机制。我们通过标准的囚徒困境博弈来衡量合作意愿,并使用二元独裁者博弈来衡量利他行为意愿。在基线处理中,像往常一样,由实验者提供参与博弈所需的禀赋;在对照处理中,禀赋来自他人的善举。在四项不同的比较以及总共572名受试者中,我们从未发现当禀赋来自善举时,合作或利他行为会显著增加。我们得出结论,善举不一定会激发他人的善举。虽然这与理论预测相符,但它对大多数其他实验研究提出了挑战。