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Re: reshape problem [was: Re: st: From: Qunzi Zhang <zhangqunzi@googlemail.com>]


From   Qunzi Zhang <zhangqunzi@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: reshape problem [was: Re: st: From: Qunzi Zhang <zhangqunzi@googlemail.com>]
Date   Thu, 1 Nov 2012 16:17:15 +0100

Hi Nick,
I am not doing analysis in Stata neither for panel analysis. But using
stata, I want to have the format which I shown as before.

Thanks


On Thu, Nov 1, 2012 at 4:13 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> Your data doesn't obviously have a panel identifier, unless it is -permno-.
>
> The command to reshape your data is called -reshape-.
>
> Your data already seem to have the best structure for most panel
> analyses. It's not clear that you will be better off reshaping.
>
> Nick
>
> On Thu, Nov 1, 2012 at 3:06 PM,  <owner-statalist@hsphsun2.harvard.edu> wrote:
>
>> May I ask you a question about construction the data set?
>>
>> Currently I have the following panel data format
>> permno    date    prc
>> 27174    19700102    56.375
>> 20386    19700102    34
>> 12052    19700102    28.75
>> 27174    19700101    56.375
>> 20386    19700101    34
>> 12052    19700101    28.75
>>
>>
>>
>> in Stata, how can I reshape the data and get the format as below: a
>> big matrix the row is the date, column is the firm identity permno and
>> input is the stock price?
>>
>> date          firm 1 firm2 firm3 .....(permno as identifer index for firm)
>> 19700101   56.37 5.37 6.35
>> 19700102  .7  .37 .35
>>
>>
>> I think merge could be the correct command but using it might create a
>> lot of dta wrt each firm.... Can you please suggest me an efficient
>> way to do this?
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