FAQ Listing

Interested applicants should discuss their ideas with BJS staff, in particular the Unit Chief responsible for a statistical program area.  Discussions can be facilitated by sending an email to [email protected] with the subject line “IPA” and a brief statement of interest.

BJS accepts, on an ongoing basis, ideas and concept papers for projects from potential applicants for an IPA mobility assignment. Individuals may submit concept papers to BJS at any time by emailing the documents to [email protected] with the subject line “IPA.” Papers will be routed to the appropriate BJS staff for follow-up. Concept papers should be no more than 3 pages in length and should discuss the nature of a proposed project. BJS will contact all persons who submit concept papers for IPAs. 

BJS may also solicit concept papers from individuals who have been identified as qualified for a particular project.

Applicants to the IPA Mobility Program will have to demonstrate that they have the requisite skills, capabilities, and experience to conduct a project under the IPA Mobility Program. The skill level should be commensurate with the scope, content, and focus of a project. Applicants may demonstrate skills and capabilities by submitting a resume or curriculum vitae (CV). Letters of reference may also be required, if a CV does not sufficiently demonstrate skills. 

When a potential candidate has been identified, BJS will contact the management of the candidate’s organization to confirm that an IPA mobility assignment is feasible and in the interests of the organization.

The projects performed under an IPA will focus on a specific BJS statistical program.  However, when several programs are closely related, a project may address issues common to several programs. 

The level of support is conditional on the nature of the project, skills, and expertise of the IPA. Under the IPA, BJS will provide support for salary, benefits, and travel costs associated with the project.

The duration of an IPA is variable, depending on the nature of the project. It may last up to 2 years, and an extension for an additional 2 years may be granted if the extension benefits both BJS and the IPA’s home host agency. An IPA can be full-time, part-time, or intermittent.

It is not necessary that an IPA relocated to the Washington, D.C., area. However, if an IPA is off-site, routine travel to BJS will be required to discuss the project and meet with BJS staff.  If an IPA is structured so that a person relocates to Washington, D.C., to work at BJS, BJS will not pay relocation expenses.

BJS periodically collects data on pregnancy at admission and maternal health services received since admission in its Survey of Prison Inmates and Survey of Inmates in Local Jails. BJS released a prison and jail report on this topic. BJS also publishes an annual report based on data collected from the Federal Bureau of Prisons under the First Step Act. Additionally, BJS conducted a study to assess the feasibility of collecting maternal health data at the state, federal, local, and tribal levels and released a report.

BJS does not hold copyrights on the suggested information; it may be freely distributed, copied, or reprinted. We encourage the appropriate citation: The U.S. Department of Justice, Office of Justice Programs, Bureau of Justice Statistics. If the data were acquired from a published report, please provide the report title, NCJ number, and release date. If acquired from the website, please provide the correct URL: https://bjs.ojp.gov/.

When national estimates are derived from a sample, as with the NCVS, caution must be used when comparing one estimate to another estimate or when comparing estimates over time. Although one estimate may be larger than another, estimates based on a sample have some degree of sampling error. The sampling error of an estimate depends on several factors, including the amount of variation in the responses and the size of the sample. When the sampling error around an estimate is taken into account, the estimates that appear different may not be statistically different.

One measure of the sampling error associated with an estimate is the standard error. The standard error can vary from one estimate to the next. Generally, an estimate with a small standard error provides a more reliable approximation of the true value than an estimate with a large standard error. Estimates with relatively large standard errors are associated with less precision and reliability and should be interpreted with caution.

Data users can use the estimates and the standard errors of the estimates provided in NCVS reports to generate a confidence interval around the estimate as a measure of the margin of error. A confidence interval around the estimate can be generated by multiplying the standard errors by ±1.96 (the t-score of a normal, two-tailed distribution that excludes 2.5% at either end of the distribution). Therefore, the 95% confidence interval around an estimate is the estimate ± (the standard error X 1.96). In other words, if different samples using the same procedures were taken from the U.S. population, 95% of the time the estimate would fall within that confidence interval. See the NCVS Methodology for an example.

These data are archived with the rest of the arrest-related and custody deaths collected from federal agencies at the National Archives of Criminal Justice Data.

The NICS Improvement Amendments Act of 2007 (NIAA), Pub. L. 110-180, was signed into law by the President on January 8, 2008. The NIAA amends the Brady Handgun Violence Prevention Act of 1993 ("the Brady Act") (Pub. L. 103-159), under which the Attorney General established the National Instant Criminal Background Check System (NICS). The Brady Act requires Federal Firearms Licensees (FFLs) to contact the NICS before transferring a firearm to an unlicensed person for information on whether the proposed transferee is prohibited from receiving or possessing a firearm under state or federal law. The NIAA was a bipartisan effort to strengthen the NICS by increasing the quantity and quality of relevant records accessible to the system.

The NIAA was enacted in the wake of the April 2007 shooting tragedy at Virginia Tech. The Virginia Tech shooter was able to purchase firearms from an FFL because information about his prohibiting mental health history was not available to the NICS and the system was therefore unable to deny the transfer of the firearms used in the shootings. The NICS is a critical tool in keeping firearms out of the hands of prohibited persons, but it is only as effective as the information entered into the databases upon which it relies. The NIAA seeks to address the gap in information available to NICS about such prohibiting mental health adjudications and commitments and other prohibiting backgrounds. Filling these information gaps will better enable the system to operate as intended to keep guns out of the hands of persons prohibited by federal or state law from receiving or possessing firearms.