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st: hausman after xtlogit - appropriate conditions

From   Tanuku AP <>
To   Stata <>
Subject   st: hausman after xtlogit - appropriate conditions
Date   Fri, 22 Jul 2011 12:50:37 -0400

Hello all,

I understand that we can use the ---hausman--- after ---xtlogit--- for testing fe vs. re specifications.

Here is my problem: 

* panelid: zip code
* time: year  (2005-2011)

* for most zip codes, the binary dependent variable is always zero.

* ----xtlogit, fe----- excludes all units where there is no variation in the dependent variable.  

The FE model runs with 1,700 observations vs. 22,000 observations for RE model.

Is the use of ---hausman--- appropriate here?  As a note, the test runs and rejects the default null hypothesis.

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