National Incident-Based Reporting System, 1998

The National Incident-Based Reporting System (NIBRS) is a part of the Uniform Crime Reporting Program (UCR), administered by the Federal Bureau of Investigation (FBI). In the late 1970s, the law enforcement community called for a thorough evaluative study of the UCR with the objective of recommending an expanded and enhanced UCR program to meet law enforcement needs into the 21st century. The FBI provided its support, formulating a comprehensive redesign effort. Following a multiyear study and in consultation with local and state law enforcement executives, new guidelines for the Uniform Crime Reports were created. The National Incident-Based Reporting System (NIBRS) is being implemented to meet these guidelines. NIBRS data are archived at ICPSR as 13 separate data files, which may be merged by using linkage variables. The data focus on a variety of aspects of a crime incident. The Batch Header Segment (Parts 1-3) separates and identifies individual police agencies by Originating Agency Identifier (ORI). Batch Header information, which is contained on three records for each ORI, includes agency name, geographic location, and population of the area. Part 4, Administrative Segment, offers data on the incident itself (date and time). Each crime incident is delineated by one administrative segment record. Also provided are Part 5, Offense Segment (offense type, location, weapon use, and bias motivation), Part 6, Property Segment (type of property loss, property description, property value, drug type and quantity), Part 7, Victim Segment (age, sex, race, ethnicity, and injuries), Part 8, Offender Segment (age, sex, and race), and Part 9, Arrestee Segment (arrest date, age, sex, race, and weapon use). Part 10, Group B Arrest Report Segment, includes arrestee data for Group B crimes. Window Segments files (Parts 11-13) pertain to incidents for which the complete Group A Incident Report was not submitted to the FBI. In general, a Window Segment record will be generated if the incident occurred prior to January 1 of the previous year or if the incident occurred prior to when the agency started NIBRS reporting. As with UCR, participation in NIBRS is voluntary on the part of law enforcement agencies. The data are not a representative sample of crime in the United States. For 1998, 17 states, fully or partially participating in NIBRS, were included in the dataset.

国家基于事件报告系统（National Incident-Based Reporting System, NIBRS）是统一犯罪报告计划（Uniform Crime Reporting Program, UCR）的组成部分，由美国联邦调查局（Federal Bureau of Investigation, FBI）负责管理。
20世纪70年代末，执法界呼吁对UCR开展全面评估研究，旨在提出扩容优化后的UCR方案，以满足21世纪的执法工作需求。联邦调查局为此提供支持，启动了全面的重新设计工作。历经多年研究，并与地方及州级执法主管部门磋商后，研究团队制定了新版统一犯罪报告指南。国家基于事件报告系统（NIBRS）正是为契合该指南而推行的。
NIBRS数据由政治与社会研究跨大学联盟（Inter-university Consortium for Political and Social Research, ICPSR）归档为13个独立数据文件，可通过关联变量实现合并。该数据集聚焦犯罪事件的多维度特征。
批次标题段（第1-3部分）通过发起机构标识符（Originating Agency Identifier, ORI）区分并标识各独立警务机构。每个ORI对应三条记录构成的批次标题信息，包含机构名称、地理位置及辖区人口规模。
第4部分为行政段，涵盖事件核心信息（日期与时间），每起犯罪事件对应一条行政段记录。
此外还包含以下模块：第5部分为犯罪段（含犯罪类型、案发地点、武器使用情况及偏见动机）；第6部分为财产段（含财产损失类型、财产描述、财产价值、毒品类型与数量）；第7部分为受害者段（含年龄、性别、种族、族裔及受伤情况）；第8部分为犯罪者段（含年龄、性别及种族）；第9部分为被捕者段（含逮捕日期、年龄、性别、种族及武器使用情况）。
第10部分为B组逮捕报告段，涵盖B组犯罪的被捕者相关数据。
窗口段文件（第11-13部分）涉及未向联邦调查局提交完整A组事件报告的案件。通常而言，若案件发生于上一年1月1日之前，或案发时该机构尚未启动NIBRS报告工作，则会生成窗口段记录。
与UCR一致，执法机构自愿参与NIBRS项目。该数据集并非美国犯罪情况的代表性样本。1998年的数据集纳入了全部或部分参与NIBRS项目的17个州的数据。