The Missing Comparator: What Bail Reform Research Actually Measured

In a recent BlackPressUSATV segment titled Justice & Policy Reform: Cash Bail Reform — A Better Way Forward, one of the featured speakers asserted that "data indicates" sending a defendant a text message is more effective at securing court appearance than a bail bondsman. It is worth pausing on the structure of that claim.

To support it with data, a researcher would need to design a study with at least two arms: defendants released with text-message reminders only and no commercial surety, and defendants released on commercial surety. The researcher would then measure failure-to-appear, recapture, and long-term fugitive rates across both arms.

That study has never been conducted. Not by a reform researcher, not by an industry researcher, not by a government auditor, not by anyone. It does not exist.

What the Studies Actually Measured

What does exist is a body of research the reform movement has built up over the past decade — and almost none of it actually answers the question that reform advocates routinely claim it answers. Consider the studies most often cited as proof that low-cost reminder-based interventions can replace commercial bail.

Chohlas-Wood, Coots, Nudell, Nyarko, et al., Automated Reminders Reduce Incarceration for Missed Court Dates, Science Advances (September 2025). The authors — based at NYU, Harvard Kennedy School, and Stanford — conducted a randomized controlled trial in which public defender clients in California either received automated text reminders or did not. The treatment group's bench warrant rate was 9.7%; the control group's was 12.1%. A 20% relative reduction. The study compares texts to no texts. No arm of the study involved a commercial surety bond.

Cooke, Diop, Fishbane, Hayes, Ouss & Shah, Using Behavioral Science to Improve Criminal Justice Outcomes, ideas42 / University of Chicago Crime Lab (2018). The widely-cited New York City summons reminder field experiment. Treatment received reminders; control did not. The study compares reminders to no reminders. No surety arm.

Fishbane, Ouss & Shah, Behavioral Nudges Reduce Failure to Appear for Court (2020). Same design, follow-on. Reminders versus no reminders. No surety arm.

Lowenkamp et al. (2018) and the Multnomah County postcard reminder study — same design across the literature. Reminders versus silence.

Each of these studies is methodologically credible on its own terms. Each one establishes that a reminder is better than no reminder. None of them establishes that a reminder is better than a bondsman. To draw that conclusion from this data, a reader would have to assume that a bondsman provides nothing but a reminder — a starting assumption so detached from operational reality that it requires no rebuttal.

The Logical Gap

A study showing that X is better than nothing does not establish that X is better than Y. This is one of the oldest cautions in social science methodology, and yet it is routinely violated in popular bail reform commentary.

If a researcher gave one group of patients aspirin and gave a second group nothing, then concluded that aspirin is more effective than a cardiologist, every editor at every medical journal in the country would refuse to publish the manuscript. The treatment-versus-silence design is not a comparison to the profession the policy is designed to replace — it is a comparison to the absence of any intervention at all.

Yet this is exactly the inferential structure on which much of the popular case against commercial bail rests.

The Comparator That Does Exist

There is one major peer-reviewed study that did run a direct comparison between commercial surety and non-financial release: Eric Helland and Alexander Tabarrok, The Fugitive: Evidence on Public Versus Private Law Enforcement from Bail Jumping, 47 Journal of Law and Economics 93 (2004). It is, to date, the largest and most comprehensive empirical study of bail outcomes ever conducted: 36,231 felony defendants, drawn from 40 U.S. jurisdictions over an eight-year period.

The findings:

• Defendants released on commercial surety were 28% less likely to fail to appear than defendants released on their own recognizance.
• Among those who did fail to appear, surety-released defendants were 53% less likely to remain at large for an extended period.
• Combining both effects, defendants on surety bond were 64% less likely to be a long-term fugitive than defendants released on their own recognizance.

The authors attributed these differences to two structural features of commercial surety that are absent from public release mechanisms: a private financial incentive to ensure appearance, and the legal authority to recapture skips that police agencies cannot match in practice. Public law enforcement is not paid by results in fugitive recovery. A bondsman, who forfeits the full bond on a permanent skip, is.

Selection in Citation

There is a curious pattern in how reform-aligned commentary handles the available research. The studies that share funding ecosystems with reform foundations — text-reminder field experiments, behavioral-nudge studies, and policy-shift outcome papers — are cited routinely, often without mention of the absent comparator. They are presented as proof that reform works.

The Helland-Tabarrok study, the only large-scale peer-reviewed work that directly compared surety release to non-financial alternatives, is largely absent from the reform literature. When it does appear, it is typically dismissed on grounds of its publication date or its authors' institutional affiliations.

Both observations can be true at once. Helland-Tabarrok used data from 1988 to 1996. The mechanism it identified — that private financial liability for an outcome produces stronger results than public administrative oversight — is not a finding that depends on the data being recent. The mechanism is structural, and it has not changed.

A Better Standard

The path out of this circular situation is straightforward in principle: design and fund a study with a real comparator. Random assignment is impractical, because judges set bail individually and constitutional concerns prevent assigning defendants to release conditions by lottery. But quasi-experimental designs are well-developed in this field.

A research design that compares matched cohorts — defendants of similar risk profile, charge severity, and prior history, some released on commercial surety and others released on text-reminder-only conditions — would, for the first time, give the public an evidence base proportional to the policy stakes.

Until that research exists, the public is being asked to support sweeping changes to pretrial release on the basis of studies that did not measure what is claimed. The National Association of Bail Agents would welcome that research. The bail profession is confident in what its operational data and the peer-reviewed comparative literature already show. The reform movement should be willing to test its own claims against a real comparator.

In the absence of such a study, every assertion that text reminders, supervision-only release, or pretrial services agencies outperform commercial surety should be read with the skepticism every unfalsified claim deserves: as advocacy, not evidence.

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Sources

• Eric Helland & Alexander Tabarrok, The Fugitive: Evidence on Public Versus Private Law Enforcement from Bail Jumping, 47 J.L. & Econ. 93 (2004).
• Alex Chohlas-Wood et al., Automated Reminders Reduce Incarceration for Missed Court Dates, Science Advances (Sept. 2025).
• Brice Cooke et al., Using Behavioral Science to Improve Criminal Justice Outcomes (ideas42 / U. of Chicago Crime Lab, 2018).
• Alissa Fishbane, Aurelie Ouss & Anuj K. Shah, Behavioral Nudges Reduce Failure to Appear for Court, Science (2020).
• Christopher T. Lowenkamp et al., Reducing Court-Date Failures Through Reminders, Federal Probation (2018).
• BlackPressUSA, Justice & Policy Reform: Cash Bail Reform — A Better Way Forward (BlackPressUSATV, May 6, 2026).