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Policymakers seeking empirical evidence on social policy interventions often find themselves confronted with a mountain of academic studies that are potentially relevant to the question. Without some systematic way to sort through the evidence, there is a risk that analysts will become mired in the...
Family background is known to have a substantial impact on students’ literacy and numeracy results. This raises questions about whether any of the remaining differences in results are due to school performance – or whether they are merely due to random noise. This article reviews...