Feldman, Betsy J.; Rabe-Hesketh, Sophia - In: Journal of Educational and Behavioral Statistics 37 (2012) 6, pp. 703-736
In longitudinal education studies, assuming that dropout and missing data occur completely at random is often unrealistic. When the probability of dropout depends on covariates and observed responses (called missing at random [MAR]), or on values of responses that are missing (called informative...