Uniform Crime Reporting Program Data [United States]: County-Level Detailed Arrest and Offense Data, 1999 (ICPSR 3167)

1. Two major changes to the Uniform Crime Reports (UCR) county-level files were implemented beginning with the 1994 data. A new imputation algorithm to adjust for incomplete reporting by individual law enforcement jurisdictions was 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 its state. Secondly, a new Coverage Indicator was 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. In the arrest files (Parts 1-3 and 5-7), data were estimated for agencies reporting 0 months based on the procedures mentioned above. However, due to the structure of the data received from the FBI, estimations could not be produced for agencies reporting 0 months in the crimes reported files (Parts 4 and 8). Offense data for agencies reporting 1 or 2 months are estimated using the above procedures. Users are encouraged to refer to the codebook for more information.

3. No arrest data were provided for Florida, Kansas, and Wisconsin. Limited arrest data were available for Illinois, Kentucky, Montana, New Hampshire, and Washington, DC. Limited offense data were available for Illinois, Kansas, Kentucky, Mississippi, Missouri, Montana, and South Dakota.

4. 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.

5. Users should note that there are no records in the data for the borough of Denali, Alaska (FIPS code 02068) in any of the collections of the Uniform Crime Reporting Program Data [United States]: County-Level Detailed Arrest and Offense Data from 1990 to 2003. The borough of Denali, Alaska (FIPS code 02068) was created from part of the Yukon-Koyukuk Census Area (FIPS code 02290) an unpopulated part of the Southeast Fairbanks Census Area (FIPS code 02240) effective December 7, 1990. Since no agency records for either arrests or crimes reported from Denali were present in any of the original FBI files, no data for the borough of Denali, Alaska appear in any the ICPSR collections for these years.

self-enumerated form

• United States Department of Justice. Federal Bureau of Investigation. Uniform Crime Reporting Program Data [United States]: County-Level Detailed Arrest and Offense Data, 1999. ICPSR03167-v4. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2006-01-16. http://doi.org/10.3886/ICPSR03167.v4

2006-03-30 File CB3167.ALL.PDF was removed from any previous datasets and flagged as a study-level file, so that it will accompany all downloads.

2006-01-16. Miami-Dade county code was changed from 025 to 086 in the data to match the documentation.

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.

2002-11-22 All the arrest files were modified to include the county code 999, which identifies the Connecticut State Police record.

2002-06-19 Data for Parts 2 (Arrests, Adult), 3 (Arrests, Juveniles), 6 (Allocated Statewide Data for Arrests, Adults), and 7 (Allocated Statewide Data for Arrests, Juveniles) are now available.

2001-12-21 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.