Date:         Sat, 19 Feb 2011 23:45:30 -0500
Reply-To:     R B <ryan.andrew.black@gmail.com>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         R B <ryan.andrew.black@gmail.com>
Subject:      Multivariate Mixed Model: Follow Up
Content-Type: text/plain; charset=ISO-8859-1

I don't have much time, but I wanted to follow up on a post I made
quite a while back:

http://www.listserv.uga.edu/cgi-bin/wa?A2=ind1001&L=spssx-l&P=R24876

Upon reflection and research of the multivariate mixed model I
presented a while back, I believe a better parameterization would be
to employ a REPEATED statement with an UNstructured covtype. Using the
example I provided previously, the BASIC code should be written as:

MIXED Y BY Indic WITH X1
  /FIXED=Indic Indic*X1 | NOINT SSTYPE(3)
  /METHOD=REML
  /PRINT=DESCRIPTIVES SOLUTION
  /REPEATED=Indic | SUBJECT(ID) COVTYPE(UN).

I can provide a more detailed explanation of my thninking at another
time if someone's interested.

Ryan

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