. . . [L]ow-skilled immigration to the United States has contributed to substantial reductions in the time allocated to basic child care by college-educated mothers of non-school age children. However, these mothers have not reduced the time allocated to more stimulating educational and recreational activities with their children. P. 26.
That is from the conclusions of this paper by Amuedo-Dorantes and Sevilla-Sanz. The tile is "Low-skilled Immigration and Parenting Investments of College-educated Mothers in the United States: Evidence from Time-use Data."