st: how to do fixed effects with weights? (problem using svy: with xtreg, fe)

[ah2574@columbia.edu]

I am analyzing longitudinal data on children's educational achievement  
using the "xtreg, fe" command.  My challenge is that I can't seem to  
weight the data with the "svy:" command when running a fixed effects  
model.  I am working with Early Childhood Longitudinal  
Study-Kindergarten Cohort data from the National Center for Education  
Statistics; the study employed a multistage probability sample design  
(with three stages).

As advised by a technical consultant at the American Institutes for  
Reserach, I am currently "survey setting" the data using replicate  
weights as follows:
svyset [pweight=c1_5fp0], jkrweight( c1_5fp1-c1_5fp90, multiplier(1))

I then attempted to run the fixed effects model with this syntax:
svy jacknife: xtreg ztime incneed married momwork numchild, i(childid2) fe

I receive the following error message:
xtreg is not supported by svy with vce(jackknife)

I checked the official Stata help pages, and they simply say that svy  
does not support xtreg.  They do not offer a solution.  I tried using  
xi to create dummies for each child, but even with matsize and maxvar  
set to the maximum permitted, the models still won't run.  (There are  
nearly 20,000 children in the dataset.)  Does anyone have any  
suggestions?  Thanks in advance for your help, as I am a novice at  
working with survey data!

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