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RE: st: Getting a random sample from panel data

From   "Nick Cox" <>
To   <>
Subject   RE: st: Getting a random sample from panel data
Date   Wed, 10 May 2006 21:23:35 +0100

I am not clear what Stas has in mind here. 

As far as I can see the official -sample- 
command has no -cluster()- option. 

However, this question arose quite recently
on Statalist. Scott Merryman and I put our answers together as 
an FAQ: 

How can I sample clusters, not individuals?

The Statalist FAQ does advise you to look at the FAQs
before posting. 


Stas Kolenikov
> you should be able to tweak -sample- with -cluster- option for your
> purposes. It selects the whole cluster, in your case, the whole panel.

Christer Thrane

> > In my panel data (one observation per year), the variable 
> lpnr identifies
> > persons and the variable aar identifies panels.
> >
> > I wish to obtain a 10% probability sample that is 
> representative in terms of
> > persons (lpnr). But if the person is selected, I want to 
> follow him or her
> > throughout the panels (aar).
> >
> > Findit "random sample" did not help me, though.

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