Uniform Crime Reporting Program Data [United States]: County-Level Detailed Arrest and Offense Data, 1994 (ICPSR 6669)

1. (1) As in past years, data were aggregated to the county level. However, two major changes to the UCR county-level files are being implemented with the 1994 release. A new imputation algorithm to adjust for incomplete reporting by individual law enforcement jurisdictions has been adopted. Within each county, data from agencies reporting 3 to 11 months of information were weighted to yield 12-month equivalents. Data for agencies reporting less than 3 months of data were replaced with data estimated by rates calculated from agencies reporting 12 months of data located in the agency's geographic stratum within their state. Secondly, a new Coverage Indicator has been created to provide users with a diagnostic measure of aggregated data quality in a particular county. Data from agencies reporting only statewide figures were allocated to the counties in the state in proportion to each county's share of the state population. (2) No arrest data were provided for Kansas, and only the city of Wichita provided offense data for Kansas. Also, no arrest or offense data were reported for the state of Montana. Complete data were not reported for Delaware, Illinois, and Mississippi. For drug offenses, Alabama reported only totals for drug sale/manufacture and drug possession. Breakdowns of individual drug categories were not reported. (3) Uniform Crime Reporting (UCR) program staff at the Federal Bureau of Investigation (FBI) were consulted in developing the new adjustment procedures. However, these UCR county-level files are not official FBI UCR releases and are being provided for research purposes only. Users with questions regarding these UCR county-level data files can contact the National Archive of Criminal Justice Data at ICPSR. (4) The codebook is provided as a Portable Document Format (PDF) file. The PDF file format was developed by Adobe Systems Incorporated and can be accessed using PDF reader software, such as the Adobe Acrobat Reader. Information on how to obtain a copy of the Acrobat Reader is provided on the ICPSR Web site.

self-enumerated forms

• U.S. Dept. of Justice, Federal Bureau of Investigation. UNIFORM CRIME REPORTING PROGRAM DATA [UNITED STATES]: COUNTY-LEVEL DETAILED ARREST AND OFFENSE DATA, 1994. 3rd ICPSR ed. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [producer and distributor], 2001. http://doi.org/10.3886/ICPSR06669.v3

2006-01-12 All files were removed from dataset 9 and flagged as study-level files, so that they will accompany all downloads.

2005-11-04 On 2005-03-14 new files were added to one or more datasets. These files included additional setup files as well as one or more of the following: SAS program, SAS transport, SPSS portable, and Stata system files. The metadata record was revised 2005-11-04 to reflect these additions.

2001-02-16 A correction was made to the formula for calculating the Coverage Indicator listed in the ICPSR Data Collection Description section of the codebook. The machine-readable documentation was converted to PDF.

1997-03-07 Data for two variables in Part 4 (INDEX and MODINDX) were corrected, and the entire data file was replaced.

1997-01-22 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:

• Standardized missing values.
• Performed recodes and/or calculated derived variables.
• Checked for undocumented or out-of-range codes.