The effect of immigration policy regime change on state-level participation rates of the special supplemental nutrition program for women, infants, and children in the United States

The change in immigration policy in state-level participation rates of the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) in the United States by citizenship and ethnicity was estimated over the period 2013-2018 using the Triple Difference estimate method. The principal finding was that the state-level WIC participation rate for Hispanic non-citizens was lower by 8.6% relative to all other groups (Hispanic citizens, non-Hispanic citizens, and non-Hispanic non-citizens). This study then not only provides quantitative evidence concerning the ongoing debate about the impact of the immigration policy changes under the Trump administration but also extends the extant literature by estimating the causal effects of immigration policy regime change on WIC participation of non-citizens.