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RE: st: Panel with minimum observations


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Panel with minimum observations
Date   Sun, 15 Mar 2009 19:55:53 -0000

See 

<http://www.hsph.harvard.edu/cgi-bin/lwgate/STATALIST/archives/statalist
.0903/date/article-689.html> 

for explanation and an even simpler alternative. 

Nick 
n.j.cox@durham.ac.uk 

Christian Bustamante


When I use the -egen- comman Stata prints the following error

. by nit: egen myN=_N
unknown egen function _N()
r(133);

So I used the -gen- command, and it works how I want to.

On Sun, Mar 15, 2009 at 2:54 AM, Joseph McDonnell <jockmcdock@gmail.com>
wrote:
> . sort myid
> . by myid: egen myN=_N
> . drop if myN<=2
>
> Of course, dropping is quite a severe step. You might prefer to use
> one of the 'mark' commands or just use the 'if' qualifier.
>
>
> On Sun, Mar 15, 2009 at 3:36 PM, Christian Bustamante
<cdeb77@gmail.com> wrote:
>
>> I runing a panel data model with a large dataset. The panel is
>> unnbalanced, so there is individuals with one or two observations. I
>> don't want to use this observations in my model, how can I set it?

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