February 2010
IZA DP No. 4789: Non-Response Biases in Surveys of School Children: The Case of the English PISA Samples
revised version published as 'Non-response biases in surveys of schoolchildren: the case of the English Programme for International Student Assessment (PISA) samples' in: Journal of the Royal Statistical Society, Series A (Statistics in Society), 2012, 175 (4), 915-938