Der Hamburger macht es immer öfter, der Mecklenburg-Vorpommer immer seltener: Die Bibliotheksnutzung nimmt im ganzen Land zu, aber die Unterschiede zwischen den Bundesländern werfen Fragen auf. - Faz.net
Many interpret countries' scores in international testing as grades of their national educational policies. Summarising evidence from international maths exams, this column finds that the highest-scoring countries are those with the least inequality in test scores, suggesting a “virtuous” equity-efficiency trade-off. It also finds that countries perform even better when test scores are highly correlated with the number of books in the family home.