This book provides a discussion ofadvances in our understanding of the juvenile offender. These derive from psychological and criminological theoryand researchonthe phenomenonofyouth crime and from efforts on the part of social science researchers and practitioners to develop and evaluate new approaches to prevention and treatment. The theoretical and empirical advances relate, first, to analyses of the nature and extent ofyouth crime. This is reflected, for example, in various descriptive and classification systems developed for characterizingjuvenile offenders. Significant advances are also being made in understanding the risk factors associated with youthful criminal activity, as well as the processes linking the risk factors with antisocial behaviors. This understanding