Displaying 1 result from an estimated 1 matches for "tp4637715p4637732".
2012 Jul 25
3
zeroinfl problem: cannot get standard errors, hessian has NaN
Hi!
I have three models.
In the first model, everything is fine.
However, in the second and third models, I have NA's for standard errors:
The hessians also have NaN's (same for m2 and m3).
What should I do about it? It there a way to obtain the hessian without
transforming my variables? I will greatly appreciate your help!
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