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st: subpopulation in the svy command
I need to estimate a svypossion model and I am only interested in a
I was curious to see how the "subpop" command would affect my results since
Stata Manual emphasized the importance of using "subpop" instead of "in".
Therefore, I estimated two models, one with the "subpop" command, the other
with the "if" command.
I was expecting to see different standard errors. However, I got different
coefficients in addition to different variances.
Based on what I read from the manual, I got the impression that only
variances would be affected by using the "if" command.
Could the coefficients be different?
Thank you in advance for your help.
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