Why are data so difficult to compare over years?
Caution must be used when using trend data, as definitions and reporting capabilities change over ti...  Read More

Where can I locate state-specific data on prison populations?
The Prisoners bulletin series provide state-level data on prisoners under the jurisdiction of s...  Read More

What is the difference between jails and prisons?
Jails are locally operated short-term facilities that hold inmates awaiting trial or sentencing or b...  Read More

Why do data take so long to collect and publish?
Data collections vary in scope, burden, and frequency of collection - (see individual data collectio...  Read More

Why are there so many different counts for those under correctional supervision?
As with any specialized field, criminal justice has specific terms to convey specific ideas. Persons...  Read More