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Re: st: GSAMPLE R3300


From   Lucas <lucaselastic@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: GSAMPLE R3300
Date   Thu, 6 Sep 2012 08:03:11 -0700

I've never used gsample, but it sounds like if you re-scale the
weights so that they sum to 1 everything should work.  The relative
weights would therefore remain the same, the only difference would be
the sum, which, I agree, should be irrelevant to the sampling program.

On Thu, Sep 6, 2012 at 7:28 AM, Lieke Boonen (SiRM)
<Lieke.Boonen@sirm.nl> wrote:
> Dear StataUsers
>
> We try to take a sample from our population, without replacement. we have several subgroeps with a high sampling weight. However with the gsample command it gives an error because for these cases the w_i*n /sum(w) is lager than 1. We thought the program looked at the relation between the weights and that this should not be a problem. Does anyone recognize this problem and is there a solution for this problem?
>
> many thanks,
> Lieke Boonen
>
> command: gsample 30000, [aweight = pop_weight], wor
> error: mm_upswor(): 3300 22140 cases have w_i*n/sum(w)>1
> mm_sample(): - function returned error
> <istmt>: - function returned error
>
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