National Incident-Based Reporting System, 2009: Extract Files

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). The extract files version of NIBRS was created to simplify working with NIBRS data. Data management issues with NIBRS are significant, especially when two or more segment levels are being merged. These issues require skills separate from data analysis. NIBRS data as formatted by the FBI are stored in a single file. These data are organized by various segment levels (record types). There are six main segment levels: administrative, offense, property, victim, offender, and arrestee. Each segment level has a different length and layout. There are other segment levels that occur with less frequency than the six main levels. Significant computing resources are necessary to work with the data in its single-file format. In addition, the user must be sophisticated in working with data in complex file types. For these reasons and the desire to facilitate the use of NIBRS data, ICPSR created the extract files. The data are not a representative sample of crime in the United States.

国家事件基于报告系统（NIBRS）是统一犯罪报告计划（UCR）的一部分，由联邦调查局（FBI）负责管理。NIBRS的提取文件版本旨在简化对该数据集的操作。NIBRS在数据管理方面存在的问题尤为突出，尤其是在两个或多个数据段级别合并时。这些问题需要具备与数据分析不同的技能。由FBI格式化的NIBRS数据存储在一个单独的文件中。这些数据按照不同的数据段级别（记录类型）进行组织。存在六个主要的数据段级别：行政、犯罪、财产、受害者、犯罪嫌疑人和逮捕者。每个数据段级别具有不同的长度和布局。还有一些数据段级别出现的频率低于六个主要级别。处理这种单一文件格式的数据需要大量的计算资源。此外，用户还需要在处理复杂文件类型的数据方面具备一定的复杂性。鉴于这些原因以及对促进NIBRS数据使用的渴望，美国犯罪政策与司法研究所在此基础上创建了提取文件。这些数据并非美国犯罪的真实代表性样本。