Notes: The ability measures have been standardized. All models control for the full interaction between the child’s country of origin and year of birth. Standard errors adjusted for clustering on the adoptive father are in parentheses. In Columns 1 and 4, the adoptive father’s abilities have been corrected for measurement errors using the reliability ratios in Table 3. The estimates in Columns 2, 3, 5, and 6 are based on predicted parental abilities using the adoptive uncles and the first-stage relationships in Table 2. In Columns 3 and 6 the first-stage relationships have been adjusted with the relative sibling correlations for different abilities in Table 7.