st: filling missing values

["Zied Ouelhazi" <ouelhazizied@gmail.com>]

Dear statalisters

I am working on panel data. Using PCSE regression I need to fill in missing 
values for some covariates. what is the best method to interpolate (Y is the 
covariate and X is time var) if the pattern is unknown: ipolate or cipolate 
or csipolate?

thanks 

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