A theoretical framework about protective factors (models protection, controls protection, support protection) Concern with the context of human action-its content, structure, organization, and implications for behavior-has burgeoned in recent decades; and research designs in social and developmental psychology have increasingly sought to incorporate measures of the social environment along with individual difference measures. The current preoccupation with context was, of course, presaged long ago by Kurt Lewin (1951) and more recently by Urie Bronfenbrenner (1986), as well as by others. Cronbach (1982), for example, argued that "Understanding an adolescent's experience … seems to require a community-wide ecological perspective" (p. 74) and that perspective has animated a wide array of contemporary studies (e.g., Arthur, Hawkins, Pollard, Catalano, & Baglioni, 2002;Beam, Gil-Rivas, Greenberger, & Chen, 2002;Cook, Herman, Phillips, & Settersten, 2002;Crosnoe, Erickson, & Dornbusch, 2002;Eccles, Early, Frasier, Belansky, & McCarthy, 1997;Elder & Conger, 2000;Elliott et al., 2005;Furstenberg, Cook, Eccles, Elder, & Sameroff, 1999;Herrenkohl et al., 2000;Novak & Clayton, 2001). Such studies have encompassed various domains of the social environment including the family, the peer group, the school, and the neighborhood; and they have investigated a wide range of adolescent experience including depression, academic achievement, delinquency, and substance use.We report a cross-national study of adolescent samples in the United States and the People's Republic of China that employed a psychosocial theory of protective factors and risk factors to articulate the content of four key social contexts of adolescent life-the family, the peer group, the school, and the neighborhood. The protection-risk conceptual framework used in this research emerges from a reformulation and extension of Problem-Behavior Theory