st: implementation of variance formula

[Inna Becher <inna.becher@uni-konstanz.de>]

Dear statalisters,

I have to implement a formula of the variance of modified 
horvitz-thompson-estimator. 
My dataset is very large, so I cannot produce a lot of new variables in order to do that. 
Should I use mata? Are there any examples of implementing variance 
formulas in stata?
Thank you.

Inna Becher


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