To benchmark our score’s predictive power, we compared its predictive power to the predictive power of other common variables: mother’s education, father’s education, both mother’s and father’s education, verbal cognition, household income, and a binary indicator for marital status. For each variable, we calculated the variable’s incremental R2 using the same procedures as those described above, with the same set of control variables. (For “mother’s and father’s education,” we calculated the incremental R2 from adding both variables as regressors.) The results of this analysis are shown in Supplementary Table 39A and depicted in Figure 4B and Supplementary Figure 12.
