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RE: st: Wide to Panel


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Wide to Panel
Date   Tue, 17 Oct 2006 14:18:07 +0100

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

> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of David Kantor
> Sent: 17 October 2006 14:17
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: Wide to Panel
> 
> 
> At 08:24 AM 10/17/2006, Alice Dobson wrote:
> >Hi all,
> >I have a datafile containing an unabalanced panel of firms 
> for a period of
> >around 10 years. This file contains data on around five 
> variables. I have
> >procured additional data on around 15 firm-level variables 
> for these set of
> >firms. However, the problem is that each variable is in a 
> different excel
> >file and that too in a wide format. I can transfer these 
> files into stata
> >format using stat transfer. Could anyone please tell me if 
> its possible to
> >convert these multiple data files into one datafile in the 
> panel format?
> >
> >Each individual file for a single variable looks like this. 
> There are 15
> >such files, one for each varible. The numberf of firms is 
> too large and
> >hence will take a lot of time to do by hand.
> >
> >FIRM     1985    1986   1987   1988   1989   1990   1991   
> 1992   1993  1994
> >
> >FIRM1   100      123      124     3001     293   324   512        413
> >FIRM2
> >FIRM3
> >FIRM4
> >:
> >:
> >:
> >:
> >FIRM1002
> >
> >
> >Best,
> >Alice
> 
> Start by Stat/Transferring these into Stata.
> 
> But your column names of  "1985", "1986" , etc. will get rendered as, 
> I believe, "_1985", "_1986", etc..
> 
> Each of those needs to be further renamed to have a common prefix 
> that is distinct for the given table.  Presumably, each table is one 
> variable, so the prefix should correspond to that variable.  Thus, if 
> the table is "number of employees" you should rename the variables 
> something like
>   nemp1985, nemp1986, etc.
> If your table is about revenue, then name them rev1985, rev1985, etc.
> 
> (You could, alternatively, change the column names in the Excel 
> tables.  But in any case, for the transfer to go smoothly, the Excel 
> tables need to be "clean" -- have just the column names in the first 
> row, and the data in all subsequent rows.)
> 
> Do this for each table.
> Then you will want to merge all the tables together.
> 
> Presumably you also want to -reshape wide-.  That could come before 
> or after the merge.
> 
> Hope this helps.
> --David
> 
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