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st: RE: select a random obs from dataset


From   "Alex Ogan" <aogan@ArrowstreetCapital.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: select a random obs from dataset
Date   Wed, 17 May 2006 10:03:28 -0400

This will select one person randomly per household:

gen randomvar = uniform()
bysort householdid (randomvar): gen selectionflag = _n==1 

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Akihito
Tokuhara
Sent: Wednesday, May 17, 2006 9:55 AM
To: statalist@hsphsun2.harvard.edu
Subject: st: select a random obs from dataset

Dear all,

My colleague wants to know how to select a random obs with some
conditions 
from her dataset.
She wants to select one person randomly per household, but also with 
condition that there is
no repetition of household (no household should appear twice in the
outcome, 
although the
person is different).

I don't know the method and I don't know if this can be done by Stata or

not. If there is a way, or some suggestions, I would appreciate very
much. 
Many thanks in advance.

Akihito

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