This study is a follow-up to the National Jail Census, 1970.
In addition to gathering more information concerning jails, the survey
also collected demographic data, incarceration history, and legal
status data from a sample of the inmates of local jails. The study
includes basic demographic data, income and employment data, reason for
incarceration, bail status, dates of admission and sentencing, length
and type of sentence and previous incarceration history.