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Re: st: multinomial multilevel analysis in Stata


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: multinomial multilevel analysis in Stata
Date   Fri, 14 Oct 2011 17:42:47 +0200

On Fri, Oct 14, 2011 at 5:22 PM, Rosie Chen <jiarongchen2002@yahoo.com> wrote:
> (1) For example, suppose the outcome variable measures the percentage of budget purchasing luxurious items within a person's monthly salary, and it is on a continuous scale. I can recode it into a three-category variable, 1 indicating no purchase at all, 2 indicating larger than zero but smaller than 20%, and 3 indicating 20% or more. Should I treat it as an ordinal outcome or multinomial outcome?

You should not recode it at all but model the continuous variable as
is. With recoding you just loose information and loosing information
is bad.

> (3) Do I need to include weighting variable for each level of data, if there are 3 levels in the model? It seems to me to be common to use level 1 weights, but I haven't seen a lot of studies using weights for all levels.

I believe you can do so with -gllamm-.

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany


http://www.maartenbuis.nl
--------------------------

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