“…Extending the time series, Altintas (2016) finds that the gap in time spent in developmental child care between collegeeducated mothers of young children and mothers who had no more than a high school degree grew significantly from the mid-1970s through 2013, with wide gaps especially emerging in the recent period 2003-2013. However, the trends in class gaps in parental investment in children are not without nuance. Research harmonizing multiple data sets (including NLSY-CS, PSID-CDS, and ECLS) finds widening class gaps in formal child care and book ownership (Bassok et al, 2016), as well as in daily reading, frequent teaching of letters, words, or numbers, frequent story telling, visits to the zoo, a museum, and in going to a play or concert (Kalil et al, 2016), but narrowing gaps in computer use, learning activities at home, and out-of-home activities (Bassok et al, 2016) and in library visits (Kalil et al, 2016), with some suggestion that class gaps stopped increasing by 2005 or 2007 (Kalil et al, 2016).…”