The quasi-simplex model makes use of at least three repeated measures of the same variable to estimate its reliability. The model has rather strict assumptions about how various parameters in the model are related to each other. Previous studies have outlined how several of the assumptions of...

The British Household Panel Survey (BHPS) is the first study of its kind to have asked for permission to link to a range of administrative health records. Multivariate analysis is applied to investigate whether there is consent bias. We find that consent on the BHPS is not biased with respect to...