In 2014, 23 states expanded access to Medicaid (18 states that expanded access before or after 2014 were not included as part of this study). The ACA's Medicaid expansion increased income eligibility thresholds for parents, from 106% to 138% of the federal poverty level on average and, for the first time, allowed low-income childless adults to enroll. The vertical dashed black line represents the year of Medicaid expansion (2014). Still, having less unpaid time off only explains 12% of the increased income that we observed—it would be great to explore other drivers in future work!" More information: Stacy Chen et al, Medicaid expansion increased income among newly eligible adults, Health Affairs Scholar (2025).