Differences between monolingual and multilingual vocabulary development have been observed but few studies provide a longitudinal perspective on vocabulary development before and following school entry. This study compares vocabulary growth profiles of 106 multilingual children to 211 monolingual peers before and after school entry to examine…

In this paper, we estimate the effect of pupil's relative age within the first grade of primary school on mathematics and reading test scores at age 15. The main objective is to evaluate the long-term causal effect of relative age in the first grades of primary school on pupil's test in 16 different countries. We use the national rule for…

The Class of 1979 project is a longitudinal study of the consequences and implications of variability in school readiness at the age children enter school. The study followed the development of 129 children since 1979, the year in which they entered Kindergarten. Phase one and two of the research covered the years between 1979 and 1991. Phase…