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Posts in Racial Disparities
Unequal by the gun: Four decades of the Black-White firearm homicide gap 

By Alex Knorre , John MacDonald 

 Background: Firearm homicide is a leading cause of death in the United States, with substantial racial disparities documented over time. Black Americans experience disproportionately higher rates of firearm homicide compared to White Americans, reflecting long-standing social, economic, and structural inequities. This study contributes to understanding the magnitude and trends of this disparity. Objective: We investigate the Black-White population-level disparity in firearm homicide rates over 45 years in the United States and estimate the fraction of excess deaths in the Black population attributable to firearm homicides. Methods: We measure racial disparities in firearm homicides as the ratio of ageadjusted rates between Black and White populations. Using annual national firearm homicide and population data from CDC WONDER (1979–2023), disaggregated by race, age, and sex, we calculate age-adjusted Black–White mortality ratios by year and sex, as well as the number of excess Black firearm homicide deaths attributable to these disparities. Results: After a steady period of 1990-2010, the Black-White disparity began increasing and peaked in 2020 when the firearm homicide rate in males was 10.38 times higher in Blacks than Whites. There were 31,202 excess firearm homicides of Black people attributed to the Black-White racial disparity in 2021-2023. Conclusions: Despite significant declines in firearm homicides during the 1990s, the relative racial gap in firearm homicide has persisted and grown, reflecting the unequal burden of violence borne by the Black population during both declines and surges of violence.

A Race-Specific Synthetic Control Analysis of Oregon’s Measure 110

By Roland Neil, Bonnie Ghosh-Dastidar, Beau Kilmer, Michael W. Robbins, Kristin Warren

Objectives

Racial disparities in arrests are a major concern, particularly when it comes to drug enforcement. In 2021, Oregon decriminalized the possession of controlled substances as part of Measure 110 (M-110), an unprecedented policy change in the United States. We estimate how M-110 affected five types of arrests, overall and by race.

Methods

National Incident-Based Reporting System data covering 3,642 police agencies from 43 states for 2018-2023 are combined with 2020 Census data. We extend a synthetic control methodology developed for micro-level data to test whether policy effects differ across groups and whether policies affect disparities, using permutation inference to quantify uncertainty.

Results

M-110 reduced drug possession arrest rates in Oregon for the overall population (67.8%) and for the three racial groups we focus on: Black (75.6%), Hispanic (77.5%); and White (66.2%), with the reduction being statistically significantly larger for Hispanic and Black than White individuals. M-110 reduced disorder arrest rates by 30.9% for Black individuals, which is statistically significantly different from zero and the White estimate. Black-White rate differences in drug possession arrests fell by 79.5% and in disorder arrests by 41.7%. In general, M-110 did not affect arrest rates for violent, property, or drug trafficking offenses.

Conclusions

M-110 reduced drug possession arrests while reducing Black-White rate differences. M-110 led to a decrease in disorder arrests for Black individuals, suggesting police did not substitute one arrest type for another for this population. Our method offers a new approach for examining heterogeneous policy effects and how policies affect disparities.