U.S.-born children of immigrants may be less likely to receive some social services than are children of native-born immigrants, if foreign-born parents who are themselves ineligible are less likely to apply on their children's behalf. Researchers used retrospective data from a sample of about 2,400 low-income, predominantly Hispanic households in three U.S. cities to determine whether children with foreign-born caregivers were less likely than children with native-born caregivers to receive benefits from any of five programs over a 2-year period: Temporary Assistance for Needy Families (TANF), Supplemental Security Income, Food Stamps, Medicaid, and Special Supplemental Nutrition Program for Women, Infants and Children. The most significant disparities between children of citizen and noncitizen caregivers were in TANF and Food Stamp use. Overall, the gap in service usage between children with U.S.-born caregivers and foreign-born caregivers varied from program to program and depended, in part, on immigrant citizenship status, in addition to nativity status. (Contains 33 references.) (SM)