We know that immigrants around the world are more likely to start companies than native-born populations but we have a limited understanding as to why. New research suggests personality-based self-selection — in particular, a propensity for risk-taking — may be a hidden driver. The findings have implications for investors, who might want to provide services tailored to the needs of migrant entrepreneurs, including visa and legal advice, and policy makers, who might want to extend support beyond beyond the small group of later-stage international entrepreneurs who are usually the target of entrepreneurship visa programs and investment promotion agencies.