ABSTRACT
Consider the following simplified setting of the problem discussed by Dr. Rubin. (Y, R) have a joint distribution over a population of units in which Y is a variable of interest and R = 0 for a unit if it is a nonrespondent and R = 1 otherwise. Dr. Rubin considers the problem of specifying the joint distribution of (Y, R) and distinguishes two methods of doing this: https://www.niso.org/standards/z39-96/ns/oasis-exchange/table">
(M) Mixture model:
specify
Y|R
and
R,
(S) Selection model:
specify
R|Y
and
Y.
