DP10694 On the Origins of Risk-Taking

Author(s): Sandra Black, Paul J. Devereux, Petter Lundborg, Kaveh Majlesi
Publication Date: July 2015
Keyword(s): nature versus nurture, Portfolio choice, risk-taking
JEL(s): d14, g11, j12
Programme Areas: Labour Economics, Financial Economics
Link to this Page: www.cepr.org/active/publications/discussion_papers/dp.php?dpno=10694

Risk-taking behavior is highly correlated between parents and their children; however, little is known about the extent to which these relationships are genetic or determined by environmental factors. We use data on stock market participation of Swedish adoptees and relate this to the investment behavior of both their biological and adoptive parents. We find that stock market participation of parents increases that of children by about 34% and that both pre-birth and post-birth factors are important. However, once we condition on having positive financial wealth, we find that nurture has a much stronger influence on risk-taking by children, and the evidence of a relationship between stock-holding of biological parents and their adoptive children becomes very weak. We find similar results when we study the share of financial wealth that is invested in stocks. This suggests that a substantial proportion of risk-attitudes and behavior is environmentally determined.