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Re: Do strata represent distinct geographic areas within the same region? [message #23009 is a reply to message #23007] Wed, 23 June 2021 14:31 Go to previous messageGo to previous message
Bridgette-DHS is currently offline  Bridgette-DHS
Messages: 3043
Registered: February 2013
Senior Member

Following is a response from DHS Senior Sampling Specialist, Mahmoud Elkasabi:

DHS surveys are based on stratified multi-stage sampling designs, where independent multi-stage samples are selected per strata. Within each stratum implicit stratification is applied to make sure that the selected primary sampling units are representing different geographic levels and areas. More details can be found in the DHS sampling manual. So regarding your question, "whether the individuals in each strata are from the same geographic area?", the answer is no; the sample is distributed over different geographic areas.

Regarding the Oromia example you mentioned, this was a special scenario, where we had to create 3 sub-strata within the rural-Oromia to deal with the huge size of that stratum (rural-Oromia).
 
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