Survey Methodologies
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...