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st: GLLAMM and a dependent variable that is a proportion


From   Cameron Gillies <cgillies@ualberta.ca>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: GLLAMM and a dependent variable that is a proportion
Date   Thu, 28 Sep 2006 10:02:46 -0600

Greetings,

I have data with samples nested within individuals that I suspect would best
be analyzed with GLLAMM where I can include a random intercept and one or
more random coefficients.  The difficulty is that the dependent variable is
a proportion (0 to 1).  Is anyone aware if GLLAMM handles this appropriately
using family(binomial) and link(logit) or is it treating non-zeros as ones?

glm does handle this correctly, but cannot include random effects.  I have
run the data using GLLAMM, but it is not clear to me from the results how
the non-zero values are being handled.

I am trying to avoid doing a logit transformation (see
http://www.stata.com/support/faqs/stat/logit.html).

Thanks very much for any insight you may have!

Regards,
Cam 

Cam Gillies
Biological Sciences
University of Alberta



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