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Senegal continuous DHS - combine 2014 and 2015 for regional representability? [message #12559] Thu, 15 June 2017 08:03 Go to next message
fcavallaro is currently offline  fcavallaro
Messages: 9
Registered: October 2015
Location: London, UK
Member
Hello,

I am working with the Senegal DHS and would like to produce recent regionally representative estimates. I am aware the 2012-13 and 2014 surveys are individually representative at the zonal level, and combined are additionally representative at the regional level. When combining these, can the wealth quintiles be used as they are, or would they need to be recalculate on the combined sample?

Second, is it at all possible to combine 2014 and 2015 surveys to obtain regionally representative estimates? Or can the 2015 survey only be grouped with the 2016 survey?

Many thanks,
Francesca
Re: Senegal continuous DHS - combine 2014 and 2015 for regional representability? [message #12570 is a reply to message #12559] Thu, 15 June 2017 17:40 Go to previous message
Bridgette-DHS is currently offline  Bridgette-DHS
Messages: 1035
Registered: February 2013
Senior Member
Following is a response from Senior DHS Stata Specialist, Tom Pullum:

Normally the wealth quintiles are only calculated at a national level, by selecting cut points on the continuous wealth index in such a way that the weighted number of de jure (hv102=1) residents in the household survey is the same in each quintile. (But everyone in the same household must be in the same quintile.) If you wanted to apply the same procedure at lower levels of aggregation, to get at relative wealth within a geographic area, you could certainly do that.

You can pool successive rounds of the continuous survey, but if one of the surveys is restricted to certain zones or regions, then you should adjust the weights of the pooled data so that the weighted distribution matches the population distribution. Otherwise the estimates will be biased toward the over-represented areas.

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