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[Fwd: st: RE: compare models]


From   mmolina@uniroma3.it
To   statalist@hsphsun2.harvard.edu
Subject   [Fwd: st: RE: compare models]
Date   Mon, 14 Apr 2008 16:57:16 +0200 (CEST)

I have to make a regression within a data panel and I received
this errors: once as the variabile have not been created and the other
time as the variable already exists.
Could you please help me? What that these errors mean?
Thanks a lot
Alejandra

 gen lwbill=log(1+wbill)
lwbill already defined
r(110);

. gen ltfp1_ols = lrva - _b[lrk]*lrk - _b[lwbill]*lwbill- _b[lrm]*lrm if
e(sample
> )
[lwbill] not found
r(111);







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