Survey Methodologies
NIBRS Estimation Project
Beginning with the 2021 data year, estimates of crime known to law enforcement will be based solely on data provided to the FBI's National Incident-Based Reporting System, or NIBRS. In 2021, 67.9% of all crime-reporting law enforcement agencies were reporting to NIBRS, covering 65.7% of the U.S. population.
To calculate a national crime rate based on NIBRS data, BJS, in partnership with the FBI and...
Local Jail Reporting Program (LJRP) Pilot Test
FY 2021 National Census of Victim Service Providers
Supplemental Funding for the National Inmate Survey - Prisons
Iowa's Statistical Analysis Center Research and Data Projects
Annual Surveys of Probation and Parole (ASPP), Reference Years (RY) 2020-2024
National Crime Victimization Survey (NCVS) Instrument Redesign and Testing Project
Survey of Public Defenders
Methodology: Survey of Prison Inmates, 2016
Source and Use of Firearms Involved in Crimes: Survey of Prison Inmates, 2016
Survey of Prison Inmates (SPI)
The Survey of Prison Inmates (SPI) is a periodic, cross-sectional survey of the state and sentenced federal prison populations. Its primary objective is to produce national estimates for the state and sentenced federal prison populations across a variety of domains, including but not limited to demographic characteristics, current offense and sentence, incident characteristics, firearm possession and sources, criminal history, socioeconomic characteristics, family background, drug and...