Patterns of Juvenile Delinquency and Co-Offending in Philadelphia, Pennsylvania, 1976-1994

In an attempt to inform and advance the literature on
co-offending, this study tracked through time the patterns of criminal
behavior among a sample of offenders and their accomplices. This study
consists of a random sample of 400 offenders selected from all
official records of arrest (N=60,821) for offenders under age 18 in
Philadelphia in 1987. Half of the offenders selected committed a crime
alone and half committed a crime with an accomplice. Criminal history
data from January 1976 to December 1994 were gathered for all
offenders in the sample and their accomplices.