In the attraction effect, adding a dominated third option to a choice set of two options can reverse the preference for the original two options, and even increase one of the option's choice share. This constitutes a violation of the axioms of regularity and independence from irrelevant...

We use responses to a self-report survey and matched trading data to investigate the effects of personality (Big Five traits), IQ and financial literacy on individuals’ stock trading portfolios. Traits have small but significant effects: openness and extraversion are associated with...