Dear Statalisters
I'm a very beginner with Stata, so my question may be
quite trivial.
I'm using non linear least squares to estimate my
model; but the results are not so pleasant, so I need
to constrain some of my coefficient (to have them
positive).
but I don't think that the option "constraint()" is
allowed with nl (?). Then, if it is, I can't make it
taken in account by stata (but I don't know where I
have to write it in my program, and I'm not sure to
have tested all the possibilities).
Thanks a lot for helping me
Juliette
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