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empty cell when running GEE for binary data

Yue 
Hi all,

My data are binary and within-subject correlated; there are three factors of
interest and two of them are within-subject. So, I have considered modelling
the data using a binomial regression with a GEE approach (which can be
achieved using the function geeglm). One problem is that I got some empty
cells, so I can't simply use logit as a link function. I was wondering if
you know any existing R solution for this? 

also, I tired to use "cauchit" as the link function, but it turned out that
within the function geeglm "cauchit" is not available. Any idea on this? 

Many thanks!
Yue

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Yue empty cell when running GEE for binary data Jul 5 Özgür Asar empty cell when running GEE for binary data Jul 5 Yue empty cell when running GEE for binary data Jul 5