Racial disparities in criminal justice reflect behavioral differences

The claim

Racial disparities in arrest and incarceration reflect actual differences in criminal behavior. Police and courts respond to crime, not race. The disparity is statistical, not discriminatory. Addressing it requires changing behavior, not reforming the system.

The mechanism

This claim is testable: if disparities reflect behavior and not discrimination, they should disappear when controlling for offense type, severity, and prior record. The evidence at every stage of the criminal justice process contradicts this prediction.

Stage 1 — Policing (surveillance and stops): The Stanford Open Policing Project (Pierson et al., 2020, Nature Human Behaviour) analyzed 100 million traffic stops across 21 state patrol agencies and 35 city police departments. Key findings:

• Black drivers were stopped at rates 20% higher than white drivers after adjusting for driving patterns (measured using time-of-day variation — nighttime stops, when race is less visible to officers, show smaller racial disparities, a “veil of darkness” test)
• Black drivers were searched more often than white drivers despite lower “hit rates” (the probability that a search finds contraband) — indicating less probable cause, not more
• The threshold of suspicion for searching Black drivers was consistently lower than for white drivers

Stage 2 — Marijuana arrests: The ACLU’s 2020 report A Tale of Two Countries compiled FBI Uniform Crime Report arrest data and compared it to SAMHSA’s National Survey on Drug Use and Health (which measures actual drug usage via anonymous self-report). Finding: Black Americans use marijuana at nearly the same rate as white Americans (NSDUH data). Black Americans are arrested for marijuana possession at 3.73× the rate of white Americans nationally; in some states the disparity exceeds 6:1 (Iowa 8.4:1; Montana 9.6:1). The behavior is documented to be equal; the enforcement is not. This is the cleanest test of the behavioral hypothesis, because the underlying behavior is independently measured.

Stage 3 — Charging and plea bargaining: Besiki Kutateladze and Nancy Andiloro’s 2014 research (funded by NIJ) analyzed 218,000 felony cases in Manhattan. Finding: Black defendants were more likely to be held on bail, have higher bail set, receive more punitive plea offers, and go to trial — outcomes that disadvantage them at sentencing — after controlling for case characteristics and criminal history. A 2017 study by Rehavi and Starr (Journal of Political Economy) analyzed federal charging decisions and found that Black defendants were charged with crimes carrying mandatory minimums 1.75× as often as white defendants arrested for the same conduct.

Stage 4 — Sentencing: The US Sentencing Commission’s 2017 report Demographic Differences in Sentencing is the most authoritative analysis. Using multivariate regression controlling for criminal history, offense severity, departure type, district, and other legally relevant factors, the USSC found: Black male offenders received sentences 19.1% longer than similarly situated white male offenders. Hispanic male offenders received sentences 6.6% longer. These are post-Booker (2005) gaps — after the Supreme Court made guidelines advisory, which increased judicial discretion and increased racial disparities.

Upstream structural context: The “higher crime rates in Black communities” observation itself requires structural explanation. The geographic concentration of poverty — itself a product of discriminatory housing policy (redlining, racially restrictive covenants, blockbusting, and exclusionary zoning) — concentrates crime in those communities. Police are deployed more heavily there (generating more arrests from the same underlying offense rates). The crime rate in a neighborhood is not an exogenous individual-behavioral fact; it is partly a function of concentrated disadvantage produced by identifiable historical policies.

Who benefits

Attributing racial disparities to behavior insulates the system from reform — from police accountability legislation, body camera requirements, mandatory minimum repeal, and prosecutorial reform. The Fraternal Order of Police and the National Sheriffs’ Association have historically opposed accountability measures. The claim that disparities are behavioral rather than systemic also sustains the political viability of stop-and-frisk, racial profiling, and broken-windows policing strategies that generate disparate impact.

The data

BJS’s Prisoners in 2022 (published November 2023) reports the prison population by race/ethnicity. State prisoners as of December 31, 2022: 36% Black, 30% white, 24% Hispanic, despite population shares of 13%, 60%, and 19% respectively. The Black imprisonment rate (1,408/100,000) is 5.3× the white imprisonment rate (266/100,000).

USSC demographic difference data is publicly available at ussc.gov. The 2017 figures have been updated periodically; the 2022 annual report shows the gap has narrowed somewhat (to approximately 14%) but remains statistically significant and large in practical terms.

The Stanford Open Policing dataset is publicly available at openpolicing.stanford.edu. The methodological paper (Pierson et al. 2020) is open-access. The veil-of-darkness analysis — comparing daytime and nighttime stop rates, where race is less visible at night — is the most methodologically sophisticated test of discriminatory intent in policing available.

Comparators

The pattern of racial/ethnic disparity in criminal justice is not unique to the US — Canada shows similar disparities for Indigenous Canadians (5.8% of population, 32% of federal prisoners, Correctional Service Canada 2022); the UK shows racial disparities in stop-and-search under Section 60 powers (Black people 9.4× more likely than white people to be stopped; Home Office 2022). The US combines the highest incarceration rate in the world with among the largest racial disparities, compounding the scale of harm.

The counter

The strongest version of the behavioral argument concedes disparities in low-level enforcement (marijuana arrests) but argues that for violent crime, which drives most incarceration, the racial disparity reflects actual crime rates measured by victim surveys (the NCVS), not by arrest. The NCVS asks crime victims to describe their attacker; Black suspects are reported at rates roughly consistent with arrest rates for violent crime. This argument has more force for violent crime than for drug crime. The response: (1) victim identification of race carries its own accuracy problems in stressful events; (2) even for violent crime, disparities in charging, plea, and sentencing persist after controlling for offense; (3) the upstream explanation (concentrated poverty → crime concentration) makes high violent crime rates in Black communities a structural fact traceable to specific policies, not to individual character.

References

Bertrand, M., & Mullainathan, S. (2004). Are Emily and Greg more employable than Lakisha and Jamal? A field experiment on labor market discrimination. American Economic Review, 94(4), 991–1013. https://doi.org/10.1257/0002828042002561

Kline, P., Rose, E. K., & Walters, C. R. (2022). Systemic discrimination among large U.S. employers. Quarterly Journal of Economics, 137(4), 1963–2036. https://doi.org/10.1093/qje/qjac024

Pierson, E., Simoiu, C., Overgoor, J., Corbett-Davies, S., Jenson, D., Shoemaker, A., Ramachandran, V., Barghouty, P., Phillips, C., Shroff, R., & Goel, S. (2020). A large-scale analysis of racial disparities in police stops across the United States. Nature Human Behaviour, 4(7), 736–745. https://doi.org/10.1038/s41562-020-0858-1

Quillian, L., Pager, D., Hexel, O., & Midtbøen, A. H. (2017). Meta-analysis of field experiments shows no change in racial discrimination in hiring over time. Proceedings of the National Academy of Sciences, 114(41), 10870–10875. https://doi.org/10.1073/pnas.1706255114

Rehavi, M. M., & Starr, S. B. (2014). Racial disparity in federal criminal sentences. Journal of Political Economy, 122(6), 1320–1354. https://doi.org/10.1086/677255

U.S. Sentencing Commission. (2017). Demographic differences in sentencing: An update to the 2012 booker report. https://www.ussc.gov/research/research-reports/demographic-differences-sentencing

American Civil Liberties Union. (2020). A tale of two countries: Racially targeted arrests in the era of marijuana reform. https://www.aclu.org/report/tale-two-countries-racially-targeted-arrests-era-marijuana-reform