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Sibling, peer, neighbor, and schoolmate correlations as indicators of the importance of context for adolescent
G J Duncan1, J Boisjoly, K M Harris
1Institute for Policy Research, Northwestern University, 2040 Sheridan Road, Evanston, IL 60208, USA. greg-duncan@northwestern.edu
Abstract:
We use nationally representative data to calculate correlations in achievement and delinquency between genetically differentiated siblings within a family, between peers as defined by adolescents' "best friend" nominations, between schoolmates living in the same neighborhood, and between grademates within a school. We find the largest correlations between siblings, especially identical twins. Grademate and neighbor correlations are small. Peer-based correlations are considerably larger than grademate and neighbor correlations but not larger than most sibling correlations. The data suggest that family-based factors are several times more powerful than neighborhood and school contexts in affecting adolescents' achievement and behavior.
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