Re: st: weights panel-survey data

[mdeidda@stern.nyu.edu]

Dear Steven, the panel is unbalanced, the sampling unit is the 
household. The survey is carried on biannually. To each household is 
attributed a probability weight each year...but weights are modified 
each year in order to take into consideration changes in some known 
characteristics of the population.
thanks a lot

Steven Samuels wrote:

> What are your panels?  Do they all have three years of data? Please  
> describe the population sampling process. How did the sampling  
> produce different weights between years?
>
> -Steve
>
>
> On Oct 14, 2008, at 12:21 PM, mdeidda@stern.nyu.edu wrote:
>
> > Dear all
> > I am estimating a 3 year panel (random effect) using survey data.  To 
> > get correct estimates I should use sampling weights, but the  command 
> > xtreg, re does not allow me to use weights...I can use  xtreg with 
> > the option mle, which allow me to use analytic weights.  But stata 
> > requires weights to be constant within panels.
> > Is it correct to use the weights of the last year, and assume they  
> > are constant within panel?
> > Or should I simply ignore weights?
> > I really appreciate your help,
> > Manuela
> >
> >
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