Uniform Crime Reporting Program Data [United States]: Arrests by Age, Sex, and Race, Summarized Yearly, 2004

These data provide information on the number of arrests
reported to the Federal Bureau of Investigation's Uniform Crime
Reporting (UCR) Program each year by police agencies in the United
States. These arrest reports provide data on 43 offenses including
violent crime, drug use, gambling, and larceny. The data received by
ICPSR were structured as a hierarchical file containing, per reporting
police agency: an agency header record, and 1 to 43 detail offense
records containing the counts of arrests by age, sex, and race for a
particular offense. ICPSR restructured the original data to logical
record length format with the agency header record variables copied
onto the detail records. Consequently, each record contains arrest
counts for a particular agency-offense.

本数据集收录了美国各警务机构每年上报至联邦调查局（Federal Bureau of Investigation, FBI）统一犯罪报告计划（Uniform Crime Reporting Program, UCR）的逮捕人数相关信息。此类逮捕报告涵盖43类犯罪行为，包括暴力犯罪、涉毒行为、赌博及盗窃等。
大学间政治与社会研究联合会（Inter-university Consortium for Political and Social Research, ICPSR）获取的原始数据采用层级文件结构，针对每个上报警务机构，包含两类记录：其一为机构头部记录，其二为1至43条详细犯罪记录。每条详细犯罪记录对应某一特定犯罪，包含该犯罪按年龄、性别及种族划分的逮捕人数统计。
ICPSR将原始数据重构为逻辑记录长度格式，并将机构头部记录的所有变量复制至对应的详细犯罪记录中。因此，每条记录均对应某一警务机构针对某一特定犯罪的逮捕人数统计。