Re: st: tobit, margins, and prediction with outcome in logs

["Dimitriy V. Masterov" <dvmaster@gmail.com>]

Michael,

That is actually exactly what I was looking for. It somehow never
occurred to me to do it all in one step.

For posterity's sake,

E(Y|X,Y>0) Margins:
margins,
expression( exp(predict(xb)+0.5*sigma^2) * (1 -
normal((gamma-predict(xb)-sigma^2)/sigma)) *
1/(1-normal((gamma-predict(xb))/sigma)) ) at(x1=(10(10)100)) over(di);

E(Y|X) Margins:
margins,
expression( exp(predict(xb)+0.5*sigma^2) * (1 -
normal((gamma-predict(xb)-sigma^2)/sigma)) ) at(x1=(10(10)100))
over(di);

DVM


P.S. I am reading your Stata graphics book right now. It's very
helpful and beautiful!
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