The recently introduced National Pupil Database in England allows the tracking of every child through the compulsory phases of the state education system. The data from Key Stage 2 for three Local Education Authorities are studied, following cohorts of pupils through their schooling. The...

Multiple imputation is becoming increasingly established as the leading practical approach to modelling partially observed data, under the assumption that the data are missing at random. However, many medical and social datasets are multilevel, and this structure should be reflected not only in...