- Each 10% increase in state-earned income tax credit (EITC) generosity was linked to a 4.3% relative reduction in firearm suicide rates.
- EITC generosity was quantified as the percentage of the federal EITC offered by each state per year, with only refundable credits considered as exposure.
- During the study period, 20 states implemented a refundable EITC, with generosity ranging from 3.4% to 85% of the federal credit.
- States with refundable EITCs experienced an average reduction of 0.49 firearm suicides per 100,000 person-years, a 7.9% relative decline compared with states without such policies.
Source: JAMA Network Open
