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st: IVtobit estimation


From   "Leonor Saravia" <lmisaravia@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: IVtobit estimation
Date   Sat, 14 Apr 2007 22:38:08 -0400

Hello Statalist,

I'm using the ivtobit6 command to do my regressions in Stata 8, but
when I run the complete model including the ll(0) (That's the
censoring point the dependent variable has), Stata tells me that I
can't use that extension, in fact, it tells: "invalid ll".  The model
which i'm trying to run is:

ivtobit6 inversion, endog(impprom) iv(imppromVI) exog(PIB98
industria1-industria8 tamano1 tamano2 region2-region13),ll(0)

When I run the same model without the ll(0), the command functions well.

Does someone have any idea about what's happenning?

Thank you,

Leonor.
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