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Status:Closed    Asked:Nov 09, 2018 - 01:04 PM

Rep weights and full samples

I understand you are supposed to have the full sample downloaded to use rep weights. If I'm using household rep weights (ACS 2012-16), do I need to keep all person level observations? Does full sample include group quarters?


Secondly, is it impossible to test models on a random subsample and still use survey weights properly? I'm having issues with the amount of time Stata is taking to run these models and didn't know if there was a way to speed up the process.


Thank you!

 
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Voted Best Answer

An accessible explanation of what's doable and not doable and likely erroneously doable with subsamples is https://www.stata-journal.com/article.html?article=st0153.


If you rely on replicate weights, I would argue you don't have to use the full sample.


Full sample does include the group quarter observations; you can use RELATE variable or GQTYPE to identify them.


As a preliminary step, I would analyze my models with the main weight only [perwt] as far as I can recall off the top of my head what the variable name is, and expect that my standard errors could be off by a factor of at most 2. Then once I have models that I am satisfied with, I would move on to the full analysis. To make it easier in Stata, you can have


* fake settings: uncomment for prelim analysis

* svyset [pw=perwt]

* real settings: uncomment for the ultimate analysis

* svyset [pw=perwt], vce(sdr) sdrw(perwtp1-perwtp80) mse


svy : model whatever


Then when the time comes, you can run it with the real thing.


HTH


 

Nov 09, 2018 - 04:29 PM

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