Results of fitting ACE, AE, and CE models to the tendency to engage in self-employment in STR for pooled males and females, males only, and females only.

For pooled males and females the analyses are based on 2,232 twin pairs (1,062 MZ and 1,170 DZ), for males only on 888 twin pairs (419 MZ and 469 DZ), and for females only on 1,344 twin pairs (643 MZ and 701 DZ). The share of self-employed was 21% for the pooled, 32% for the male, and 13% for the female sample. In all samples we controlled for age and in the pooled sample for sex; A: additive genetic component; C: shared common environment component; E: individual-specific environment component; 95% CI: 95% confidence interval; χ2: χ2 test for goodness-of-fit, the baseline model is the ACE model; AIC: Akaike information criterion.