1994-03-10 ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:
- Performed recodes and/or calculated derived variables.
- Checked for undocumented or out-of-range codes.
2005-09-02 The data were reprocessed to match other
years of the OBTS series. Old ICPSR administrative variables were
removed. The variables "Date of Arrest: Day," "Date of Police Disp:
Day," "Date Prosec Dispos: Day," "Date Final Court Disp: Day," and
"Sentencing Date: Day," previously removed from the data, have been
included in the data file. A public version of the data has been
created in which the Day variables are blanked. Unlike the other years
in the OBTS series, a restricted version is not available. Also, Part
2, which was an old SAS setup file, has been removed. The codebook and
all the SAS, SPSS, and Stata collection files have been updated to
reflect the changes.