Culture and Adolescent Substance Use 1 RUNNING HEAD: CULTURE AND ADOLESCENT SUBSTANCE USE Adolescent Cultural Contexts for Substance Use: Intergroup Dynamics, Family Processes, and Neighborhood Risks Seth J. Schwartz and Sabrina E. Des Rosiers University of Miami Jennifer B. Unger University of Southern California José Szapocznik University of Miami TO APPEAR IN R. A. Zucker & S. A. Brown (Eds.), Oxford handbook of substance use. Oxford, UK: Oxford University Press. Note: We thank Byron L. Zamboanga for his helpful feedback on earlier drafts of this chapter.