We exploit rules of class formation to identify the causal effect of increasing the number of immigrants in a classroom on natives test scores, keeping class size constant (Pure Composition Effect). We explain why this is a relevant policy parameter although it has been neglected so far. We show...

This paper presents an empirical study of birth-order and sibship sex-composition effects on educational achievement, and uses these variables as instruments to estimate returns to education, with the help of a rich set of individual data. Our sample includes more than 12,000 men and 10,000...

We discuss how a schooling system’s structure may imply that private school enrolment leads to worse subsequent performance in further education or in the labour market, and we seek evidence of such phenomena in Italian data. If students differ not only in terms of their families’ ability to...