| Sumario: | A study was conducted to examine distinctive trends of police contacts among heterogeneous subpopulations of youths in the early transition stages of their criminal careers. Data were obtained from computerized police archival records in a large western Canadian city, and event history survival models were used to estimate patterns of onset and persistence for delinquent careers over six-month intervals in the early stages of police contact. Findings indicated that there is meaningful short-term change in offending among multiple levels of youth subgroups. Whereas some youths seem to offend for only a short time and then stop, other youths continue to offend and at a higher rate. However, there also seem to be patterns of heterogeneity within as well as between these subgroups of young offenders during the initial stages of criminal careers.
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