Dopamine and risk choices in different domains: Findings among serious tournament bridge players

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• 作者：Anna Dreber (1)
  David G. Rand (2)
  Nils Wernerfelt (3)
  Justin R. Garcia (4)
  Miguel G. Vilar (4)
  J. Koji Lum (4)
  Richard Zeckhauser (5) richard_zeckhauser@harvard.edu
• 关键词：Risk preferences &#8211 ; Dopamine &#8211 ; Risk ; taking &#8211 ; Contract bridge &#8211 ; Advantageous risks &#8211 ; DRD4
• 刊名：Journal of Risk and Uncertainty
• 出版时间：August 2011
• 出版年：2011
• 期刊代码：15_08955646
• 类别：eco
• 卷：43
• 期：1
• 页码：19-38
• 数据来源：sp

摘要

We explore how risk-taking in the card game contract bridge, and in a financial gamble, correlate with variation in the dopamine receptor D4 gene (DRD4) among serious tournament bridge players. In bridge risk-taking, we find significant interactions between genetic predisposition and skill. Among men with the 7-repeat allele of DRD4, namely 7R + men, those with more bridge skill take more good risks and fewer bad risks, while the opposite is found for less-expert 7R + men. Conversely, skill does not predict risk-taking among men without the 7R + allele. Consistent with some prior studies, we also find that 7R + men take more risk in the financial gamble. We find no relationship between 7R + and either risk measure among our female subjects. Our results suggest that the dopamine system plays an important role in individual differences in risk-taking among men, and is the first to distinguish between advantageous and disadvantageous risk-taking.