Table 1.
Model-fitting estimates under a range of assumptions regarding assortative mating and gene–income correlation
| Assumptions | Estimates of path | ||||
|---|---|---|---|---|---|
| rGS | rIA | a | c | i | x (/SE) |
| .50 | .00 | .679 | .593 | .252 | .061 (2.40) |
| .10 | .681 | .595 | .181 | .055 (2.15) | |
| .20 | .678 | .610 | .110 | .049 (1.87) | |
| .30 | .680 | .627 | .039 | .041 (1.53) | |
| .55 | .00 | .717 | .549 | .252 | .058 (2.36) |
| .10 | .718 | .550 | .177 | .053 (2.12) | |
| .20 | .720 | .562 | .102 | .047 (1.84) | |
| .30 | .721 | .583 | .027 | .040 (1.51) | |
| .60 | .00 | .761 | .484 | .252 | .055 (2.31) |
| .10 | .762 | .488 | .173 | .049 (2.08) | |
| .20 | .764 | .503 | .093 | .044 (1.81) | |
| .30 | .765 | .529 | .014 | .038 (1.50) | |
| .65 | .00 | .814 | .389 | .252 | .051 (2.26) |
| .10 | .816 | .394 | .167 | .046 (2.03) | |
| .20 | .817 | .415 | .083 | .041 (1.78) | |
| .30 | .819 | .451 | −.002 | .035 (1.48) | |
Note: Values of parameter e not shown, under all conditions e = .347. rGS = genetic correlation between sibs; rIA = correlation of income with additive genes. Paths: a = additive genes to NMSQT; c = family environment other than income to NMSQT; i = family income to NMSQT; x = product of additive genes and income to NMSQT; (/SE) = ratio of x to its standard error. Standard errors as provided by Mplus based on maximum likelihood fitting