The DHS Program User Forum
Discussions regarding The DHS Program data and results
Home » Data » Weighting data » Pooled datasets - weighting data problem
Re: Pooled datasets - weighting data problem [message #2242 is a reply to message #2225] Sun, 01 June 2014 15:36 Go to previous messageGo to previous message
Reduced-For(u)m
Messages: 292
Registered: March 2013
Senior Member

I think one issue we haven't dealt with (yours) is re-normalizing weights when using a sub-population. For a simple solution, I'd suggest going with the recommendation from the DHS staff (buried somewhere in this thread) for when you have multiple survey rounds from the same country - just use the regular weights*.

The idea is that, if the sample sizes are similar across survey rounds, the re-normalizing shouldn't matter much (you are implicitly weighting each survey by sample size when using the regular weights). And with the sub-pop command, I'm not sure how you would want to re-normalize anyway (that bit of survey design inference I'm not real teched up on and the Stata documentation isn't super helpful to me - I think the right re-normalizing might somehow relate to the ratio of the prevalence of the sub-population to the full population, probably across strata or something really difficult and nuanced).


*Note - you want to use the "subpop" command and you want to create new identifiers for "cluster" and "strata" that are survey-round specific (say, replacing cluster "10" with cluster "svy2011_10" or something like that.

**Additional option: just take out all the sub-pop observations from both rounds, sum (within round) all the weights, and divide the old weights by the sum of the new weights. Then you have sub-populations only in each survey round, and each round has the same total weight, but nothing is "population representative", it's just corrected for selection probability across the sub-population.

Any thoughts from the DHS staff on either of these options?
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Continuous Survey Weights
Next Topic: Normalizing weight for region/province
Goto Forum:
  


Current Time: Tue Jan 31 22:09:27 Coordinated Universal Time 2023