## Missing Values

If an observation has a missing value for any variable used in the
independent effects, then the analyses of all dependent variables omit
this observation. An observation is deleted from the analysis of
a given dependent variable if the observation's value for that
dependent variable is missing. Note that a missing value in one
dependent variable does not eliminate an observation from the analysis
of the other dependent variables.
During processing, PROC VARCOMP groups the dependent variables on their
missing values across observations so that sums of squares and
cross products can be computed in the most efficient manner.

Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.