Date: Wed, 25 Jul 2007 10:26:44 -0500
Reply-To: Robin High <robinh@UNLSERVE.UNL.EDU>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Robin High <robinh@UNLSERVE.UNL.EDU>
Subject: Re: Type IV SS in GLM?
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> The usual advice for using type IV SS in PROC GLM is to use them when
> you have a missing cell and there is more than a 1-way ANOVA. In my
> case I have a 2 x 4 factorial ANOVA in which two of the cells have all
> values of 0. Is it appropriate, or even permissible, to use type IV SS
> in this instance? TIA
Yes, and if you have access to "Analysis of Messy Data", Vol 1, by
Milliken and Johnson, Chapter 13-14 addresses these issues quite nicely
with interpretation of a 'cell means' model.