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Re: variables for svyset in Stata (Bangladesh 2011) [message #3734 is a reply to message #3566]

Tue, 03 February 2015 13:50

mmr-UMICH
Messages: 21
Registered: February 2015
Location: A2, MI

Member

To avoid such an error/warning :"Note: missing standard errors because of stratum with single sampling unit.", we can use singleunit() in svyset command line that specifies how to handle strata with one sampling unit. By default, svyset uses singleunit(missing) that results in missing values for the standard errors. I usually use to handle such situations by using method singleunit(centered) that specifies that strata with one sampling unit are centered at the grand mean instead of the stratum mean.
e.g., for your code: svyset psu [pweight=wt], strata(strata) singleunit(centered)
Other methods are:
singleunit(certainty) causes strata with single sampling units to be treated as certainty units. Certainty units contribute nothing to the standard error.
singleunit(scaled) results in a scaled version of singleunit(certainty). The scaling factor comes from using the average of the variances from the strata with multiple sampling units for each stratum with one sampling unit.

Thanks,

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[Message index]

		variables for svyset in Stata (Bangladesh 2011) By: kmorris on Fri, 09 January 2015 13:31
		Re: variables for svyset in Stata (Bangladesh 2011) By: Reduced-For(u)m on Fri, 09 January 2015 16:17
		Re: variables for svyset in Stata (Bangladesh 2011) By: mmr-UMICH on Tue, 03 February 2015 13:49
		Re: variables for svyset in Stata (Bangladesh 2011) By: mmr-UMICH on Tue, 03 February 2015 13:50
		Re: variables for svyset in Stata (Bangladesh 2011) By: Trevor-DHS on Tue, 03 February 2015 19:57
		Re: variables for svyset in Stata (Bangladesh 2011) By: mmr-UMICH on Tue, 03 February 2015 22:58
		Re: variables for svyset in Stata (Bangladesh 2011) By: Trevor-DHS on Wed, 04 February 2015 08:09

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