To impute or not to impute? A practical guide for handling missing data in longitudinal surveys. George Ploubidis.

Maximising the plausibility of the Missing At Random Assumption: Results from the 1958 British birth cohort. Tarek Mostafa.

How well do methods that assume data are Missing At Random perform when the missing data generating mechanism is not ignorable?  Evidence from the 1958 British birth cohort. Brian Dodgeon.