The concentration of social groups in certain geographic areas and institutions is not a new phenomenon, but since the current migration crisis, one of the world's largest since the end of the Second World War, it has reached an unprecedented level. This poses important challenges to many education systems: the arrival of newcomers often leads to…

This article deals with the debate on the assessment of pupils' socioeconomic dispersion among schools. First, the paper complements the traditional way of measuring "segregation," which refers to the distribution of a specific subgroup of pupils across different schools, by introducing a new measure which we call "school…