Section I: Setting the Stage Chapter 1: Friendships and Peer Groups in the Teen Years-Our Perspective D. Wayne Osgood Chapter 2: Overview of the PROSPER Prevention Trial's Rationale, Methods, and Findings: The Context for Friendship Network Study Richard Spoth, Lisa M. Schainker, Mark Greenberg, and Janet Welsh Chapter 3: Network Methods: Explanations and Issues James Moody and D. Wayne Osgood Chapter 4: A Descriptive Overview of Social Networks and Behavior Among PROSPER Youth Erin Tinney Section II: Risky Behaviors, Relationships, and Development Chapter 5: Teen Friendships, Networks, and Substance Use Daniel T. Ragan and D. Wayne Osgood Chapter 6: Does Criminal Justice Contact Alter Friendship Ties? Wade C. Jacobsen and Erin Tinney Chapter 7: Depression, Isolation, and Self-Harm Molly Copeland and Sonja Siennick Chapter 8: The Role of Parenting in Shaping the Friendship Context of Adolescent Substance Use Kelly L. Rulison, Avery Chahl, and Evelien M.

Hoeben Chapter 9: Dating, Sexuality, and Adolescent Friendship Networks Nayan G. Ramirez, Rose Wesche, and Derek A. Kreager Chapter 10: Variation in Network Processes Across Community and School District Contexts Cassie McMillan, Daniel Ragan, and Alana Colindres Chapter 11: Peer Networks and the Diffusion of Intervention Outcomes Kelly L. Rulison and Mark E. Feinberg Chapter 12: Genetic Susceptibility to Peers Gabriel L. Schlomer, Amanda M. Griffin, H. Harrington Cleveland, and David J.

Vandenbergh Section III: Discussion and Conclusions Chapter 13: Future Directions for Research on Networks and Adolescent Health Thomas W. Valente Chapter 14: The Growth of Longitudinal Social Network Analysis René Veenstra, Teresa Bertogna, and Lydia Laninga-Wijnen Chapter 15: Social Capital and Adolescent Development Mark Feinberg Publications of the PROSPER Peers Project PROSPER Peers Project Personnel.