= Ignorable missingness mechanism
= Ignorable
{synonym}
A missingness mechanism is ignorable for <likelihood function>[likelihood] or <Bayesian inference> about outcome-model parameters when the missingness-model factor can be omitted without changing that inference. <missing at random> together with distinct outcome and missingness parameters is a standard sufficient condition for <likelihood function>[likelihood] inference; <Bayesian inference> also requires the corresponding <prior distribution>[prior] factorization, so outcome and missingness parameters are <independent random variables>[independent] a priori.
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