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These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.

This research sought to analyze the length of time served by state prisoners in Michigan from 1985 to 2008. It was conducted to address research that showed Michigan had the longest prison stays in the United States of America, the substantial impact that time served had upon state prison populations, and to assess the effect of parole and sentencing policy on time-served. The research utilized National Corrections Reporting Program (NCRP) data available through the National Archive of Criminal Justice Data (NACJD) in order to build upon past-research and contribute to the understanding of state-specific patterns and trends across offenses and racial groups.

In order to address policy effects upon time served, the purpose of this study was to contextualize patterns of time served across 20 years within the parole and sentencing policy changes in Michigan; the impact of reforms in 1999 were of particular focus.

There are no data files available with this study. Only syntax files used by the researcher(s) are provided.

The National Corrections Reporting Program (NCRP) compiles offender-level data on admissions and releases from state prison, post-confinement community supervision and year-end prison custody records. The data are used to monitor the nation's correctional population and address specific policy questions related to recidivism, prisoner reentry, and trends in demographic characteristics of the incarcerated and community supervision populations. The Bureau of Justice Statistics (BJS) has administered the NCRP since 1983. Abt Associates has served as the NCRP data collection agent since October 2010. As with all other BJS data collections, participation is voluntary, and not all states submit NCRP data each year.

This version of the NCRP data contains data for term records, prison admissions, prison releases, and year-end prison population counts. The data files have selected variables making the data suitable for public release. The complete version of NCRP data is classified as restricted access. Please search for ICPSR No. 37608 to find the analogous complete version of this file.

The National Corrections Reporting Program (NCRP) compiles offender-level data on admissions and releases from state prison, post-confinement community supervision and year-end prison custody records. The data are used to monitor the nation's correctional population and address specific policy questions related to recidivism, prisoner reentry, and trends in demographic characteristics of the incarcerated and community supervision populations. The Bureau of Justice Statistics (BJS) has administered the NCRP since 1983. Abt Associates has served as the NCRP data collection agent since October 2010. As with all other BJS data collections, participation is voluntary, and not all states submit NCRP data each year.

This version of the NCRP data contains data for term records, prison admissions, prison releases, and year-end prison population counts. The data files have selected variables making the data suitable for public release. The complete version of NCRP data is classified as restricted access. Please search for ICPSR No. 37971 to find the analogous complete version of this file.

The National Corrections Reporting Program (NCRP) compiles offender-level data on admissions and releases from state and federal prisons and post-confinement community supervision. The data are used to monitor the nation's correctional population and address specific policy questions related to recidivism, prisoner reentry, and trends in demographic characteristics of the incarcerated and community supervision populations. The Bureau of Justice Statistics (BJS) has administered the NCRP since 1983. Abt Associates has served as the NCRP data collection agent since October 2010. This version of the NCRP contains selected variables making it suitable for public release.

This version of the NCRP data contains data for term records, prison admissions, prison releases, and year-end prison population counts. The data files have selected variables making the data suitable for public release. The complete version of NCRP data is classified as restricted access. Please search for (ICPSR No. 38047) to find the analogous complete version of this file.

The National Corrections Reporting Program (NCRP) compiles offender-level data on admissions and releases from state and federal prisons and post-confinement community supervision. The data are used to monitor the nation's correctional population and address specific policy questions related to recidivism, prisoner reentry, and trends in demographic characteristics of the incarcerated and community supervision populations. The Bureau of Justice Statistics (BJS) has administered the NCRP since 1983. Abt Associates has served as the NCRP data collection agent since October 2010. This version of the NCRP contains selected variables making it suitable for public release.

This version of the NCRP data contains data for term records, prison admissions, prison releases, and year-end prison population counts. The data files have selected variables making the data suitable for public release. The complete version of NCRP data is classified as restricted access. Please search for (ICPSR No. 38491) to find the analogous complete version of this file.

The National Corrections Reporting Program (NCRP) compiles offender-level data on admissions and releases from state and federal prisons and post-confinement community supervision. The data are used to monitor the nation's correctional population and address specific policy questions related to recidivism, prisoner reentry, and trends in demographic characteristics of the incarcerated and community supervision populations. The Bureau of Justice Statistics (BJS) has administered the NCRP since 1983. Abt Associates has served as the NCRP data collection agent since October 2010. This version of the NCRP contains selected variables making it suitable for public release.

This version of the NCRP data contains data for term records, prison admissions, prison releases, and year-end prison population counts. The data files have selected variables making the data suitable for public release. The complete version of NCRP data is classified as restricted access. Please search for (ICPSR No. 39233) to find the analogous complete version of this file.

The Bureau of Justice Statistics (BJS) began designing the National Prisoner Statistics Program - Coronavirus Pandemic Supplement (NPS-CPan) in spring 2020, while simultaneously adding questions on the effects of COVID-19 to its Annual Survey of Jails and Annual Surveys of Probation and Parole. The NPS-CPan was conducted from April to October, 2021 by Abt Associates, Inc. on behalf of BJS, as part of the existing multiyear award to collect annual National Prisoner Statistics (NPS-1b) and National Corrections Reporting Program (NCRP) data.

The NPS-CPan was designed to be fielded a single time, and was administered to the 50 state departments of corrections (DOCs) and the federal Bureau of Prisons (BOP), which is also responsible for housing felons sentenced in the District of Columbia. Respondents were asked to complete a survey requesting details on the monthly custody prison population, admissions, and releases of prisoners from January 2020 to February 2021 and counts and demographic distributions of prisoners who tested positive for and who died from COVID-19. In addition, questions covered policies and practices used by states and the BOP to mitigate transmission of the virus, expedite release of prisoners, and determine the process by which staff and prisoners were vaccinated in early 2021. This 14-month survey period allowed BJS to track monthly trends in admissions and custody populations immediately prior to widespread COVID-19 infections in the United States, as well as capture the introduction of vaccines to prison systems.