This article focuses on the early years of children from immigrant families in Germany. Research has documented disparities in young children’s development correlating with their family background (e.g., immigrant or ethnic minority status), making clear the importance of early intervention. Institutional childcare—as an early intervention for children at risk—plays an important role in Germany, as 34.3% of children below the age of three and 93% of children above that age are in external childcare. This paper focuses on the extent to which children from families with a background of migration differ in their social development when considering their age of entry into early external childcare (and thus its duration). Data from the infant cohort study of the German National Educational Panel Study (NEPS, N = 1,846) is used to analyze the impact of early institutional childcare before the age of 3 years on children’s social competence at the age of 5 years, controlling for gender, siblings, temperament, home learning activities, and socioeconomic status. Results show the effects of duration of early external childcare on peer problems for children from families with a background of migration, in such a way that children who attend early external childcare for more than 1 year before the age of three show less problem behavior with peers than those who attend for less than a year. These findings have equity implications for children with a migration background living in Germany, especially as the proportion of these children is trending upwards.

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Maternal interaction behavior, particularly maternal language input, is considered to be one of the key factors for child vocabulary development. Previous studies have shown that a higher quantity and diversity of maternal language input is associated with faster vocabulary development. In the present study, we examined cognitive-verbal stimulation as a specific aspect of maternal input, controlling for other relevant internal child characteristics and external environmental influences. Additionally, we compared the effects of cognitive stimulation on vocabulary development with a standard measurement of maternal language input, such as its quantity, to identify specific the effects of cognitive-verbally stimulating interaction behavior. We used data from the Newborn Cohort Study of the German National Educational Panel Study (N = 1127 families) and conducted latent growth curve modeling to examine the vocabulary growth of children between 3 and 7 years of age. As control variables, we also included maternal education and household income in the analyses as well as the children’s age, gender, and initial vocabulary level when they were 2 years old, their phonological working memory, and whether they were learning another native language other than German. The results indicated that general aspects of maternal input, such as the quantity and length of the utterances of maternal language input for 2‑years-olds, were relevant in the earlier stages of vocabulary development, while cognitive stimulation was an important predictor of growth across the later stages of vocabulary development in 3‑ to 7‑year-olds.