Establish the external validity of the personality–economic outcome findings

Determine whether the estimated effects of genetic propensity toward emotional stability and conscientiousness on earnings and household wealth generalize beyond individuals of European genetic ancestry in the Netherlands to other populations and environments.

Background

The analysis uses participants of European genetic ancestry from the Netherlands and links their Big Five PGIs to Dutch administrative records on earnings and household wealth. The resulting estimates therefore identify effects in a specific ancestral, national, institutional, and environmental context.

The authors explicitly leave unresolved whether these findings apply to other populations. They also note that PGIs are context-dependent measures whose weights may vary across populations and environments, making cross-population and cross-environmental generalization an open empirical question.

References

Our sample consists of individuals of European genetic ancestry from the Netherlands, and the extent to which these findings generalize to other populations remains uncertain.

— Random Genetic Variation Links Personality to Earnings and Wealth  (2610.06088 - Carvalho et al., 5 Oct 2026) in Discussion, paragraph beginning “Two other limitations concern generalizability and the interpretation of PGIs.”