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Re: st: Re: Using parent id variables in household data with Stata


From   Austin Nichols <austinnichols@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: Using parent id variables in household data with Stata
Date   Fri, 23 Nov 2012 17:44:13 +0100

DELCLOS GOMEZ-MORAN, CARLOS-ERIC <carloseric.delclos@upf.edu>:
Are there mothers of mothers? Do you care if there are?
Might do something like this:

clear
input year country houseid pid momid
     2007  0  600    60001   .
     2007  0  600    60002   .
     2007  0  600    60003   60001
     2008  0  600    60001   .
     2008  0  600    60002   .
     2008  0  600    60003   60001
     2008  0  600    60004   60001
end
bys year country houseid momid: g N=_N if !mi(momid)
g m=min(momid,pid)
bys year country houseid m (momid): g n=N[1] if mi(N)
list

See also:
http://www.stata.com/support/faqs/data-management/creating-variables-recording-properties/
http://www.stata.com/statalist/archive/2006-06/msg00323.html

On Fri, Nov 23, 2012 at 4:50 PM, DELCLOS GOMEZ-MORAN, CARLOS-ERIC
<carloseric.delclos@upf.edu> wrote:
> Hello,
>
> I am trying to count the number of children a mother has in a household
> using the mother's id variable from the EU-SILC database.
>
> Basically, the data looks something like this:
>
> Year   country   houseid   pid         momid
> 2007   UK         600          60001     .
> 2007   UK         600          60002     .
> 2007   UK         600          60003     6001
> 2008   UK         600          60001     .
> 2008   UK         600          60002     .
> 2008   UK         600          60003     6001
> 2008   UK         600          60004     6001
>
>
> So what I'd like to do is create a variable with a value for the number of
> people (children) in the household who identify the person with that pid
> (in this case 60001) as their mother.  Is this possible with Stata, and if
> so, what is the best way to go about it?
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