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RE: st: A new dataset with means by period


From   "Miguel Angel Duran" <maduran@uma.es>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: A new dataset with means by period
Date   Fri, 12 Apr 2013 14:34:39 +0200

Thanks, William.

-----Mensaje original-----
De: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] En nombre de William Buchanan
Enviado el: viernes, 12 de abril de 2013 14:15
Para: statalist@hsphsun2.harvard.edu
Asunto: Re: st: A new dataset with means by period

Read the help file for collapse. You should be using the -by()- option and not the by: prefix.

Sent from my iPhone

On Apr 12, 2013, at 5:12, "Miguel Angel Duran" <maduran@uma.es> wrote:

> Sorry, Geomina, I meant collapse (not compress), but collapse does not 
> work with by:.
> 
> -----Mensaje original-----
> De: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] En nombre de Geomina 
> Turlea Enviado el: viernes, 12 de abril de 2013 14:03
> Para: statalist@hsphsun2.harvard.edu
> Asunto: Re: st: A new dataset with means by period
> 
> Hi Miguel,
> you can do the same thing that you tried by using collapse
> 
> by date: collapse (mean) var
> 
> 
> _________________________________________Geomina Turlea TODO AQUEL QUE 
> SUEÑA SE CONVIERTE EN ARTISTA
> 
> 
> --- On Fri, 4/12/13, Miguel Angel Duran <maduran@uma.es> wrote:
> 
>> From: Miguel Angel Duran <maduran@uma.es>
>> Subject: st: A new dataset with means by period
>> To: statalist@hsphsun2.harvard.edu
>> Date: Friday, April 12, 2013, 2:53 PM From a panel data set, I want 
>> to generate a new dataset with the means per period. I have tried to 
>> use 'By date: compress (mean) var', but by: does not seem to work 
>> with compress. Will you please help me? Is there a way to do this 
>> automatically?
>> 
>> M. Angel.
>> 
>> -----Mensaje original-----
>> De: owner-statalist@hsphsun2.harvard.edu
>> [mailto:owner-statalist@hsphsun2.harvard.edu]
>> En nombre de Miguel Angel
>> Duran
>> Enviado el: lunes, 08 de abril de 2013 21:27
>> Para: statalist@hsphsun2.harvard.edu
>> Asunto: st: Dropping all subjects but those in the last period
>> 
>> My dataset includes observations for about 9000 companies per year in 
>> a twenty years period. To clean the dataset, I would like to drop all 
>> those companies that are not present in the last year (because the 
>> rest went bankrupt or were absorbed), but I do not know how to do it.
>> Can this be done
>> just by splitting the datasets by period and then merging them?  Each 
>> company has the same id across years. Thanks.
>> 
>> Miguel A. Duran.
>> 
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