st: GEE and planned missingness

[Kris Anderson <andersok@reed.edu>]

Hi, all.

I am running GEE with panel data with four waves of data. I have time 
varying predictors that were assessed at different time points (i.e., 
predictors at wave 1-3 [NMU] and a different set at waves 2-4 [CC EXPAND 
SE]). I'd like to include them in the analysis but my examination of the 
documentation (and past posts) suggests that cases with missingness at a 
given time point will be dropped. Given that data was missing by design 
for all cases at these waves, this is problematic. Is there a way around 
this?

Here's my code for reference.

xtgee mjuser CC EXPAN NMU SE sexR i.wave, f(binomial) corr(uns) 
vce(robust) eform
estat wcorr


I'd appreciate suggestions of alternatives if this is a nonstarter.

Thanks,
Kris


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