Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
The authors show how comparisons between the within-twin correlations of human capital outcomes across identical and nonidentical twins can be used to identify the variability in the individual-specific component of endowments and the responsiveness of schooling to individual-specific endowments in the family and in the marriage market even when schooling is measured with error. Estimates from two twins samples indicate that 27 (42) percent of the variance in log earnings (obesity) is due to variability in individual-specific endowments, allocations of schooling reinforce specific endowments, and individual-specific earnings endowments of men and their wives' schooling are negatively associated. Copyright 1994 by University of Chicago Press.