Spending on U.S. incarceration has increased dramatically over the last several decades. Much of this cost is on incarcerating pretrial detainees—inmates not convicted of a crime—which constitute the majority of individuals in our nation’s jails. Current statutory schemes give judges almost complete discretion to order pretrial detention based on unexplained or unidentified factors. With this discretion, judges tend to make inconsistent decisions in every jurisdiction, some releasing almost all defendants—including the most dangerous—and others detaining most defendants—even those who are safe to release. There are constitutional and moral reasons to evaluate our current detention scheme, but even the fiscal impact of pretrial detention alo...