Jail Data initiative

The problem of overincarceration has received considerable attention of late. The focus of this attention, however, has largely been on state and federal prison systems. Often overlooked are local jails. In any given year, approximately 11 million Americans will be detained in a county jail, often because they lack the funds to post bail, or even because they lack the funds to pay their fines. Yet we know little about county jail practices, including which counties are systematically jailing defendants pre-trial and/or post-fine, and about the consequences of these practices.

It is possible that longer periods of pre-trial detention, or detainees’ delayed access to counsel, actually increase recidivism, and/or escalate petty offending into more serious offending. Through the generous support of Arnold Ventures, our data science team is crawling daily county jail rosters and criminal case records in over 1,000 counties. Using these data we will be able both to identify counties that are systematically jailing defendants pre-trial and/or post-fine, and to estimate the impacts of these practices on recidivism.

The Jail Data Initiative is a founding project of Arnold Ventures’ $39 million National Partnership for Pretrial Justice.

Media Coverage: Forbes, Inside Philanthropy