Thanks Martin,
I dropped the files in the ado folder. The model ran, and the coefficients make sense. It doesn't appear to like -margeff- or -mfx- as post-estimation commands though (I get an error: "unrecognized command: dhurd_p").
For others interested, I recently found STATA code for Box-Cox double hurdle models in Moffatt,P.G. (2005) "Hurdle models of loan default." Journal of the Operational Research Society 56(Special Issue), 1063–1071. I haven't looked at it closely yet, but this may be helpful as well.
Thanks again.
Jason Franken
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