This study was undertaken to examine the ways in which different felony sanctions impact the future behavior of felony offenders. The study sought to determine whether the following made a difference in subsequent criminal behavior: (1) sentences of confinement, (2) the length of sentence (both the sentence imposed and that which was actually served), and (3) sentences of probation combined with jail ("split" sentences), or combined with fines, restitution, or other alternative sanctions. Data were collected from questionnaires completed by 18 judges of the Essex County, New Jersey, courts and by probation staff. Follow-up data were collected from official records provided by probation, jail, prison, and parole case files. Follow-up data were also collected from the following official records: (1) the New Jersey Offender-Based Transaction System Computerized Criminal History, (2) the New Jersey Department of Corrections Offender-Based Correctional Information System, (3) the United States Department of Justice Interstate Identification Index, (4) the National Crime Information Center Wanted Persons File, (5) the New Jersey PROMIS/GAVEL Prosecutors Case Tracking System, and (6) administrative record files of the New Jersey Department of Corrections. Variables in the data file include the most serious offense charge, most serious offense of conviction, dimension of conviction, offense type (person, property, social order, fraud, or drug offense), number of prior probations, number of probation revocations, number of prior jail and prison terms, mitigating and aggravating factors affecting the sentence, type of sentence, special conditions of probation, fines and restitutions imposed, minimum and maximum incarceration terms (in months), history of drug offenses, type of drugs used, probation and parole violations, total number of prior arrests and prior convictions, and longest arrest-free period after first arrest. The type of post-sentence offense, dimension, disposition charge, sentence, and date of arrest are provided for arresting events and charge episodes 1 through 108 for any offender. For up to 43 arrest events (for any offender), the date of lockup and date of exit from confinement are provided. The file also includes recommendations made by prosecutors and probation officers, and judges' ratings (on a scale of one to nine) with respect to the likelihood of an offender committing future property crimes, crimes against persons, or any crime. Judges also rated the arrest record length, conviction record length, and social stability of each offender. Retribution points, incapacitation points, and specific deterrence points assigned by the judges complete the file. Demographic variables include the race and sex of each convicted offender, and the age of the offender at first conviction.