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Status:Closed    Asked:Jul 09, 2018 - 04:29 PM

Using EARNWT for pooled analysis over multiple years and select states

According to the answer to question "Using EARNWT variable in STATA is resulting in incorrect number of observations", pooling 12 months of data will created a weighted estimate 12x the size of the population, and the recommendation to create an annualised earnings estimate was therefore to either:


a.) Divide EARNWT by 12, or

b.) Use EARNWT as-is to calculated the weighted estimate for each month and averaging over those 12 months


My question has to do with the recommendation for weighting multiple years of data but looking only at specific states. For example, if I wanted to pool 3 years of data in New York, Iowa, and Arizona, would I need to weight the estimates? If so, is (b) be the preferred approach, so that I would not have to re-scale EARNWT, since the denominators would differ by year? What would be the recommendation to re-scale EARNWT if I wanted to do everything in one step?


Finally, I'm assuming in Stata, these are population weights--is this correct?


Thanks

 
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Staff Answer

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Jeff Bloem

Staff

This method does not change because you are only looking at a handful of US states. You can limit your pooled sample to only include observations from New York, Iowa, and Arizona and then follow the methods for approximating the samping weights as discussed here.

 

Jul 10, 2018 - 09:41 AM

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