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Re: st: A new dataset with means by period
From
William Buchanan <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: A new dataset with means by period
Date
Fri, 12 Apr 2013 05:14:54 -0700
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" <[email protected]> wrote:
> Sorry, Geomina, I meant collapse (not compress), but collapse does not work
> with by:.
>
> -----Mensaje original-----
> De: [email protected]
> [mailto:[email protected]] En nombre de Geomina Turlea
> Enviado el: viernes, 12 de abril de 2013 14:03
> Para: [email protected]
> 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 <[email protected]> wrote:
>
>> From: Miguel Angel Duran <[email protected]>
>> Subject: st: A new dataset with means by period
>> To: [email protected]
>> 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: [email protected]
>> [mailto:[email protected]]
>> En nombre de Miguel Angel
>> Duran
>> Enviado el: lunes, 08 de abril de 2013 21:27
>> Para: [email protected]
>> 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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