Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: strata with single sampling units


From   sjsamuels@gmail.com
To   statalist@hsphsun2.harvard.edu
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,  <frone@ria.buffalo.edu> 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
sjsamuels@gmail.com
18 Cantine's Island
Saugerties NY 12477
USA
845-246-0774

*
*   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/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index