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首页> 外文期刊>Journal of neuroscience, psychology, and economics >Variants of the Monoamine Oxidase A Gene (MAOA) Predict Free-Riding Behavior in Women in a Strategic Public Goods Experiment
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Variants of the Monoamine Oxidase A Gene (MAOA) Predict Free-Riding Behavior in Women in a Strategic Public Goods Experiment

机译：单胺氧化酶A基因（MAOA）的变体预测妇女在战略性公共物品实验中的自由骑行行为

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Laboratory experiments have documented substantial heterogeneity in social preferences, but little is known about the origins of such behavior. Previous research on public goods experiments suggests that individual-level demographic and psychological variables correlate with player types. However, the key question about biological sources of variation in these preferences remains open. The aim of this study is to uncover genetic variations that influence differences in cooperative behavior. For this reason, we identify types of players within a strategic public goods experiment. We explicitly test for an association between individual variance in strategy choice and the functional promoter-region repeat of the Monoamine Oxidase A gene (MAOA). Our experimental findings suggest a link between MAOA and the occurrence of free-riding in females. Females with MAOA-L are less likely to behave like weak free-riders than MAOA-H carriers, whereas among males, our results did not support a significant relation between genotype and player type. Furthermore, MAOA-L female carriers contribute more than MAOA-H subjects to the public good if they know that others contribute nothing, and they showed slightly lower scores on the Machiavellianism scale. This is the first piece of evidence that genotype might predict player type within a public goods setting. It contributes to our understanding of biological drivers of economic decision making and points to the need for further exploration.
机译：实验室实验已经证明，社会偏好存在很大的异质性，但是人们对这种行为的起源知之甚少。先前对公共物品实验的研究表明，个人层面的人口统计学和心理变量与参与者类型相关。然而，关于这些偏好中的生物变异来源的关键问题仍然是未解决的。这项研究的目的是揭示影响合作行为差异的遗传变异。因此，我们在战略性公共物品实验中确定参与者的类型。我们显式测试策略选择中的个体差异与单胺氧化酶A基因（MAOA）的功能性启动子区域重复之间的关联。我们的实验结果表明，MAOA与女性搭便车的发生之间存在联系。与MAOA-H携带者相比，具有MAOA-L的女性不太可能表现为弱骑手，而在男性中，我们的结果并不支持基因型和玩家类型之间的显着关系。此外，如果MAOA-L女携带者知道别人没有贡献，他们对MAA-H主体的贡献将超过MAOA-H主体，并且她们在马基雅维利主义量表上的得分略低。这是基因型可以预测公共物品环境中玩家类型的第一项证据。它有助于我们理解经济决策的生物驱动因素，并指出需要进一步探索。

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