„In Austria […] the proficiency of disadvantaged children increases over one year of schooling (and age) at least as much as that of children from more advantaged families (who tend to be more proficient to start with). Schooling, in other words, does not reinforce preexisting inequalities and may instead contribute to reducing socio-economic gaps.“
Francesco Avvisati u. a., The learning gain over one school year among 15-year-olds: An international comparison based on PISA (2022), S. 14.