DOI: 10.3886/icpsr02910
title: Uniform Crime Reporting Program Data [United States]: County-Level Detailed Arrest and Offense Data, 1998
title: Archival Version

description: This data collection contains county-level counts of
 arrests and offenses for Part I offenses (murder, rape, robbery,
 aggravated assault, burglary, larceny, auto theft, and arson) and
 counts of arrests for Part II offenses (forgery, fraud, embezzlement,
 vandalism, weapons violations, sex offenses, drug and alcohol abuse
violations, gambling, vagrancy, curfew violations, and runaways).
description: Datasets: 
DS0: Study-Level Files
DS1: Arrests, All Ages
DS2: Arrests, Adult
DS3: Arrests, Juveniles
DS4: Crimes Reported
DS5: Allocated Statewide Data for Arrests, All Ages
DS6: Allocated Statewide Data for Arrests, Adults
DS7: Allocated Statewide Data for Arrests, Juveniles
DS8: Allocated Statewide Data for Crimes Reported
description: County law enforcement agencies in the United States.
description: (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,
 Wisconsin, and Washington, DC. Limited arrest data were available for
 Illinois, Kentucky, and New Hampshire. Limited offense data were
 available for Alaska, Illinois, Kansas, Kentucky, Mississippi,
 Missouri, Montana, South Dakota, and Wisconsin. (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) 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.