Statalisters-
So I'm using the hurdle model from Stata Journal Vol 3, No2.
program hurdle_ll
...
...
end
ml model lf hurdle_ll [equation here], svy subpop (if [variable]==1)
ml max
The first time through it runs fine, the second time it gives me the following error:
ML_subv already defined.
I traced it to the ml_max.ado, and it looks like it stems from the svy subpop () specification. How come its not being overwritten?
I seem to have found an ugly work around where I just drop it before the next run of the model. But clearly there has to be something prettier? I imagine Hilbe's hurdle models might be a better idea, but alas I'm working in version 8.2.
Any thoughts?
Thanks much
TJ
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