st: marg effects & s.e. in tobit

[John Bunge <jota.be@web.de>]

Dear All

I'd like to compute the marg. effects and its standard errors for the unconditional expect value in the tobit model. I have problems with dprobit, and dprobit2 does not provide the standard errors, or at leat it does not describe how to obtain them in the help file.

Best,

John.
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