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Re: st: weights panel-survey data


From   mdeidda@stern.nyu.edu
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: weights panel-survey data
Date   Tue, 14 Oct 2008 13:45:05 -0400

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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