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Re: st: cluster and robust in logit


From   Sue <likecats@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: cluster and robust in logit
Date   Wed, 2 Dec 2009 16:17:44 -0500

Thanks for the replies. So there is no option to implement
vce(cluster) only, without the robust option? I looked at section
20.16 in the manual, but didn't see a discussion on this (please
correct me if I'm wrong). Again, I'd appreciate your input.



On Tue, Dec 1, 2009 at 6:25 PM, Richard Williams
<Richard.A.Williams.5@nd.edu> wrote:
> At 05:56 PM 12/1/2009, Sue wrote:
>>
>> Dear Statalisters,
>>
>> I'm estimating three different logit models, one with the option
>> cluster(country) only, another with robust and yet another with
>> cluster(country) robust. The first and the third however yield the
>> same standard errors. Is this how it's supposed to be? Does the
>> cluster(.) option by default include robust for some reason? Any input
>> would be appreciated.
>
> It sounds like you are either using an older version of Stata or the old
> Stata syntax.  Either way, cluster() implies robust; specifying robust
> cluster() is equivalent to typing cluster() by itself.
>
>
> -------------------------------------------
> Richard Williams, Notre Dame Dept of Sociology
> OFFICE: (574)631-6668, (574)631-6463
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> WWW:    http://www.nd.edu/~rwilliam
>
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