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21. extroverts are more prone than introverts
to overconfidence: Peter Schaefer,
“Overconfidence and the Big Five,” Journal
of Research in Personality 38, no. 5 (2004):
473–80.
22. better off with more women: See, for example,
Sheelah Kolhatkar, “What if Women
Ran Wall Street?” New York Magazine,
March 21, 2010.
23. a strong predictor of financial risk-taking:
Camelia M. Kuhnen and Joan Y. Chiao,
“Genetic Determinants of Financial Risk
Taking,” PLoS ONE 4(2): e4362.
doi:10.1371/journal.pone.0004362 (2009).
See also Anna Dreber et al., “The 7R Polymorphism
in the Dopamine Receptor D4
Gene (DRD4) Is Associated with Financial
Risk Taking in Men.” Evolution and Human
Behavior 30, no. 2 (2009): 85–92.
24. When faced with a low probability of
winning: J. P. Roiser et al., “The Effect of