03 We 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.

The hypothesis that increases in the schooling of women enhance the human capital of the next generation and thus make a unique contribution to economic growth is assessed on the basis of data describing green revolution India. Estimates are obtained that indicate that a component of the significant and positive relationship between maternal literacy and child schooling in the Indian setting reflects the productivity effect of home teaching and that the existence of this effect, combined with the increase in returns to schooling for men, importantly underlies the expansion of female literary following the onset of the green revolution.