RT Article T1 Siblings and Adolescent Weapon Carrying: Contributions of Genetics, Shared Environment, and Nonshared Environment JF Youth violence and juvenile justice VO 15 IS 3 SP 264 OP 280 A1 Wallace, Lacey N. LA English YR 2017 UL https://krimdok.uni-tuebingen.de/Record/1744733422 AB Many past studies have observed evidence of sibling similarity and influence for delinquency and substance use. However, studies of sibling similarity for adolescent weapon carrying, particularly for weapons beyond firearms, are largely absent from the literature. The present study assesses sibling similarity in weapon carrying as well as the relative contributions of genetics, shared environment, and nonshared environment. Data are obtained from the first two waves of the National Longitudinal Study of Adolescent to Adult Health and analyzed using biometrical genetic models for twins and actor-partner interdependence models for nontwins. Results indicate little, if any, contribution stemming from genetics. There is also no evidence of a significant shared environment effect. Instead, all or nearly all of the variation and similarity in weapon carrying among siblings are related to the nonshared environment, particularly gang affiliation. Implications and possible extensions of these findings are discussed. K1 Genetics K1 Nonshared environment K1 Siblings K1 Weapon carrying DO 10.1177/1541204016639354