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st: random subsample - sample weights


From   "Ellen Van de Poel" <vandepoel@few.eur.nl>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: random subsample - sample weights
Date   Thu, 15 Feb 2007 14:14:16 +0100

Dear all,
 
I want to draw a random subsample from my data, but taking into account my
sample weights. 
I thought of inflating my data (with the command "expand") to get rid of the
weights and then draw a random subsample from the expanded data. But I'm not
sure whether this is correct, since then I can have the same observation
multiple times in the random subsample?
 
The extra difficulty is that I am working with matrix language. The code
where the random subsample is drawn looks something like this:
p0i = p0[sort(unorder(rows(p0))[|1 \ n|],1)]

So I take the first n observations, that are drawn randomly from p0, and
then sort them again. 

Thereafter I match this random subsample with another sample (I'm doing a
Fairlie decomposition). So I guess it is necessary to account for the sample
weights when I match the random subsample with another sample?

Could anyone help me with this?

Thanks a lot in advance,
Ellen Van de Poel
 
___________________________________________

Ellen Van de Poel 

 

Department of Applied Economics

Erasmus School of Economics and Business Economics 

Erasmus University Rotterdam 

Burg. Oudlaan 50  

3000 DR Rotterdam 

The Netherlands

Room H13-09

T: +31 (0) 10 408 15 02

F: +31 (0) 10 408 91 41

E : vandepoel@few.eur.nl


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