This compendium of Discussion Papers represents the work of the BJS-Princeton University Study Group on Criminal Justice Performance Measures. Papers were prepared for study group review by John J. DiIulio, Jr. (project director) and James Q. Wilson (project adviser), who wrote overview papers. Papers on performance measures of selected components of the criminal justice system were written by Mark H. Moore and Geoffrey P. Alpert, policing; Joan Petersilia, community corrections; George F. Cole, trial courts, prosecution, and public defense; and Charles H. Logan, prisons.