„ We find that the ACA had virtually no adverse effect on labor force participation, employment, or usual hours worked per week through 2014. This conclusion is true for ACA policies overall and for the Medicaid expansions in particular, and it applies to the full sample of nonelderly persons and to the subgroup of nonelderly persons with a high school education or less who are more likely to be affected by the ACA. „

For nonelderly adults with a high school education or less, we find that employment in 2014 is 1.8 percentage points higher than what would be expected given the rates of unemployment, demographic characteristics and pre-existing time trends. This finding is inconsistent with predictions that the ACA would decrease employment. „

Also for nonelderly adults with a high school education or less, we find that part-time employment is higher than expected by 0.5 percentage points. This finding is consistent with some predictions that the ACA would increase part-time work, but may also reflect the continuing recovery in the labor market. This difference is sufficiently small, however, that we find no evidence of a change in the number of hours worked in 2014 and thus no overall change in labor supply beyond what would be expected. „