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A Selection Model for Longitudinal Data with Non-Ignorable Non-Monotone Missing Values

A Selection Model for Longitudinal Data with Non-Ignorable Non-Monotone Missing Values

Missing values are not uncommon in longitudinal data studies. Missingness could be due to withdrawal from the study (dropout) or intermittent. The missing data mechanism is termed non-ignorable if the probability of missingness depends on the unobserved (missing) observations. This paper presents a model for continuous longitudinal data with non-ignorable …