3 Comments

The restricted sex-limitation models described in this section are not an exhaustive list of the sub-models of the general sex-limitation model. Within either of these restricted models (as within the general model), one can test hypotheses regarding the significance of genetic or environmental effects. Also, within the common effects sex-limitation model, one may test whether specific components of variance are equal across the sexes (e.g., $a_{m}$ may be equated to $a_{f}$, or $e_{m}$ to $e_{f}$). Again, sub-models may be compared to more saturated ones through $\chi^{2}$ difference tests, or to models with the same number of parameters with Akaike's Information Criteria.