st: xtreg and weights

[comp Avail <compavail@gmail.com>]

Apologies if this is a repost from a previous one, but my last post
didn't seem to make it to the list.

1.       I’d like to estimate a standard panel data regression model
using random effects, but with weights that vary across both time and
panels.
xtreg won’t allow that. Is there a way to get around it?


2.       I’d like to estimate a standard panel data regression model
and impose some nonlinear restrictions on the parameters of the type
b1/b2 = c1/c2. Is there a way to achieve that? Hopefully in a way that
allows weights to be applied. A solution for either fixed effects or
random effects or both, would be helpful.

Any pointers will be greatly appreciated.

Thanks

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