Date:         Mon, 12 Aug 1996 14:55:25 -0400
Reply-To:     "Dr. Steven P Ellis" <ellis@NEURON.CPMC.COLUMBIA.EDU>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         "Dr. Steven P Ellis" <ellis@NEURON.CPMC.COLUMBIA.EDU>
Organization: Research Foundation for Mental Hygiene
Subject:      proc mixed w/ nested random factors

I'd like to do a variance components analysis using proc mixed and a
model in which the fixed part contains 2 fixed factors, a few
covariates, and assorted interactions.  In addition, there are 2 random
factors.  The first random factor is subjects (repeated measures).  This
is nested in the second random factor, blocks.  Different blocks are
independent.  Different subjects are conditionally independent given
blocks.  I may also want to include an interaction of block and subject.
 
I've discussed this with colleagues more learned than I concerning these
matters.  They have some ideas but none of them are sure of how to
proceed.
 
If someone out there knows how to handle this problem, I'd like to hear
from him/her.
 
Thanks in advance.
 
                -- Steve Ellis