DOI: 10.3886/icpsr03721
title: Uniform Crime Reporting Program Data [United States]: County-Level Detailed Arrest and Offense Data, 2001
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: 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.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.No arrest data were provided for Florida. Limited
arrest data were available for Illinois and Wisconsin. Limited offense
data were available for Illinois, Kentucky, Mississippi, Montana, and
South Dakota.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.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 2001. 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.