School network
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资源简介：
This work uses data from Add Health, a program project designed by Udry,Richard J. Bearman, Peter S. & Harris, Kathleen Mullan, and funded by a grant P01-HD31921 from the National Institute of Child Health and Human Development, with cooperative funding from 17 other agencies. Special acknowledgment is due Ronald R. Rindfuss and Barbara Entwisle for assistance in the original design. Persons interested in obtaining data files from Add Health should contact Add Health, Carolina Population Center, 123 W. Franklin Street, Chapel Hill, NC 27516–2524 (addhealth@unc.edu).
创建时间：
2014-08-24
