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Re: st: sample selection (-gsample) in stata
From
Stas Kolenikov <[email protected]>
To
[email protected]
Subject
Re: st: sample selection (-gsample) in stata
Date
Wed, 6 Jul 2011 14:30:20 -0500
On Tue, Jul 5, 2011 at 4:48 PM, Shikha Sinha <[email protected]> wrote:
> -gsample looks good, but I am still struggling. How do I calculate the
> size for -gsample. I want the select companies from each cities and of
> each type in each city.
-gsample- will only produce appropriate PPS samples if you specify
sampling with replacement (which is the approximation you would have
to make at the analysis stage, anyway). PPS sampling without
replacement is far more complicated, and if the phrase "Rao-Sampford
algorithm" does not ring a bell, you will end up with wrong sampling
weights.
--
Stas Kolenikov, also found at http://stas.kolenikov.name
Small print: I use this email account for mailing lists only.
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