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RE: st: recognizing patterns within two columns of data


From   Dalhia <[email protected]>
To   [email protected]
Subject   RE: st: recognizing patterns within two columns of data
Date   Wed, 6 Jul 2011 23:07:22 -0700 (PDT)

Hello, Thanks. But egen group won't work since the holders are not the same. CompA and B (which I want grouped together) are owned by holderA and by holderB. The link is that these two companies are owned by people who also own shares in the other company - holderA owns shares in compA and also compB; similarly holderB owns shares in compA and also in compB. I want to identify those companies that are linked by multiple common owners. 

Example:
compA holderA
compB holderA
compA holderB
compB holderB
compC holderB

What I want:
compA group1
compB group1

Thanks for your help. I appreciate it.

Dalhia 

--- On Wed, 7/6/11, Nick Cox <[email protected]> wrote:

> From: Nick Cox <[email protected]>
> Subject: RE: st: recognizing patterns within two columns of data
> To: "'[email protected]'" <[email protected]>
> Date: Wednesday, July 6, 2011, 7:50 PM
> -egen, group()- ? 
> 
> Nick 
> [email protected]
> 
> 
> Austin Nichols
> 
> Do you want to make an identifier as in
> http://www.stata.com/statalist/archive/2011-07/msg00170.html
> ?
> 
> On Wed, Jul 6, 2011 at 10:12 AM, Dalhia <[email protected]>
> wrote:
> >
> > I would like some advice on how to do the following.
> Here is how the data looks:
> >
> > compA holderA
> > compB holderA
> > compC holderL
> > compD holderH
> > compA holderB
> > compB holderB
> > compC holderB
> >
> > Above, there was more than one instance where compA
> and compB had the same holder. In a large database, how do I
> identify instances where a set of comps appear repeatedly
> with the same holders?
> 
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> 

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