It means that lwbill could not be found in your model, maybe it is not
part of the first equation, or maybe you forgot it.
hope this helps,
Maarten
--- [email protected] wrote:
> 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);
>
>
>
>
>
>
>
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
