Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: xtreg and xtlogit with time-invariant variables

From   Shehzad Ali <>
To   Stata List <>
Subject   st: xtreg and xtlogit with time-invariant variables
Date   Sun, 28 Nov 2010 01:57:55 +0000 (GMT)

Hi listers,

I am wondering if someone could advise on this. 

When xtreg and xtlogit models are implemented with fixed effects option, all 
time-invariant variables are dropped from the analysis. I am working with a 
dataset with response variable observed at 3 time points. The explanatory 
variable includes timepoint_var (obviously varies with time) and the others are 
time-invariant covariates that are dropped in the analysis. Could someone advise 
on the best way to model the relationship between response at multiple 
timepoints and the time-invariant variables? I should mention that the model 
runs when random effects option is specified.

Any help would be greatly appreciated.

Many thanks,


*   For searches and help try:

© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index