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Re: st: strata with single sampling units


From   [email protected]
To   [email protected]
Subject   Re: st: strata with single sampling units
Date   Thu, 4 Mar 2010 22:52:41 -0500

I'm glad to hear that  it is working for you.  Make sure to  check
that there are no strata of the non-self-representing units which
contain only one unit.  That will sometimes happen when you analyze
subpopulations.  (If it does happen, join each offending stratum to an
adjacent stratum.

-Steve

On Thu, Mar 4, 2010 at 4:35 PM,  <[email protected]> wrote:
> Steve,
> I am now using:
>
> svyset psu [pweight=weight], strata(stratum) singleunit(certainty);
>
> This works in that I get variance estimates, and they are often much
> smaller than what one gets ignoring the stratum variable.  However, the
> odd thing is that when I try to replicate their published estimates
> (proportions) and SEs, I get basically the same SEs if I ignore the
> stratum variable.  The SEs I get using -singleunit (certainty)- tend to
> be  much smaller.



Steve Samuels
[email protected]
18 Cantine's Island
Saugerties NY 12477
USA
845-246-0774

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