Violence by and against youth continues to be one of the most challenging subjects facing criminologists. In this comprehensive and integrated analysis of the interrelationships of youth violence, violent victimization, and gang membership, Finn-Aage Esbensen, Dana Peterson, Terrance J. Taylor and Adrienne Freng seek to understand what causes youth violence and what can be done about it. Using the results from an inclusive study they conducted of eighth-graders in eleven American cities, the authors examine how the nature, aetiology, and intersections of youth violence are structured by both sex and race/ethnicity.Youth Violenceis pertinent to juvenile justice policy considerations. The authors frame their discussion within the public health perspective, focusing on risk factors associated with violent behaviour. The findings address prevalence and incidence, as well as the demo-graphic correlates and cumulative effects of the risk factors associated with engagement in violence. Ultimately, the theories and research methodologies here are essential for understanding the dynamics of youth violence.