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Re: st: xtmelogit - a very strange treatment of different levels


From   Dimitrije Tišma <dimitrijetisma@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: xtmelogit - a very strange treatment of different levels
Date   Fri, 12 Feb 2010 22:19:45 +0100

The command was a quite typical -xtmelogit-. Persons are nested within
households, i.e. they do not change the HH number over time. As the
first step I wanted only random intercepts for person and household
level, so I wrote the following:

xi: xtmelogit depvar indepvars || personID: || householdID:

I did not save the results, I am afraid, but I remember well what was
puzzling. The group statistics was strange to me, as it showed the
same number of units on both levels. Obviously, it considered the
number of person-household combinations as number of households and I
don't know why. Furthermore, while when using -gllamm- the results
change considerably by introducing another level (household), here
they were practically identical to those when using logit. Thanks in
advance for the answer.








2010/2/12 Airey, David C <david.airey@vanderbilt.edu>:
> .
>
> Show your commands and results.
>
>> Dear all,
>>
>> I am working with some household panel dataset and in order to check
>> for random effects I did both gllamm and xtmelogit regression. While
>> in gllamm everything worked fine, xtmelogit did not deal with the two
>> levels (individuals and households) the way I expected. Namely, it
>> reports the same number of units on both levels (!) and practically no
>> random effects either level. Also, the results are practically
>> identical to the results when "normal" logit regression is used. Does
>> anyone know what this could be about? Thanks a lot.
>>
>> Dimitrije
>
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