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| From | Stas Kolenikov <skolenik@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| 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 <shikha.sinha414@gmail.com> 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. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/