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st: RE: RE: AW: interactions for xtmelogit models
From
"Martin Weiss" <[email protected]>
To
<[email protected]>
Subject
st: RE: RE: AW: interactions for xtmelogit models
Date
Mon, 22 Feb 2010 18:14:45 +0100
<>
" Why isn't age not in the model? Age is with the interaction terms but not
as a single term. Would that make the model not hierarchally well-formed? "
The answer is probably that the intention is "... to test against a model
with no gender interactions, fixed or random", as stated at the bottom of
page 14 of http://www.stata.com/meeting/fnasug08/gutierrez.pdf. So the focus
is on interactions, not the main effect.
HTH
Martin
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Hardy, Dale S
Sent: Montag, 22. Februar 2010 17:59
To: [email protected]
Subject: st: RE: AW: interactions for xtmelogit models
Hi Martin,
A few months age I asked you a question about xemelogit interaction and you
send me the link below.
On page 15/36 of the presentation by Gutierrez entitled, ?Tricks of the
trade: getting the most out of xtmixed?, is a model for xtmixed
interaction.
My question is:
Why isn't age not in the model? Age is with the interaction terms but not as
a single term. Would that make the model not hierarchally well-formed?
Thanks in advance for clarifying this issue.
I look forward to hearing from you.
Dale
Dale Hardy, PhD RD CDE CHES
Research Associate
University of Texas School of Public Health
Houston, TX 77030
Phone: (713) 500-9221
Fax: (713) 500-9264
Email: [email protected]
________________________________________
From: [email protected]
[[email protected]] On Behalf Of Martin Weiss
[[email protected]]
Sent: Friday, October 16, 2009 9:38 AM
To: [email protected]
Subject: st: AW: interactions for xtmelogit models
<>
Note, for instance, the heavy use of interaction terms in
http://www.stata.com/meeting/fnasug08/gutierrez.pdf, slide 15. The
presentation is about -xtmixed-, but it may still help you approach your
problem.
Also see http://www.stata.com/meeting/2sweden/gutierrez_sweden07.pdf for
-xtmelogit-
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Hardy, Dale S
Gesendet: Freitag, 16. Oktober 2009 16:17
An: [email protected]
Betreff: st: interactions for xtmelogit models
Hi All,
I am looking at examples of xtmelogit models. I did not see any interaction
terms used or any mentioned that interaction terms is recommended for use in
these models.
Have any of you who use this method used interaction terms in your modeling?
How do you interpret the exposure variable with the interaction term/s and
the addition of mixed effects variables/s?
Any help is appreciated.
Thanks.
Dale
Dale Hardy, PhD RD CDE CHES
Research Associate
University of Texas School of Public Health
Houston, TX 77030
Phone: (713) 500-9221
Fax: (713) 500-9264
Email: [email protected]
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