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st: Heckprob and marginal effects question-Economics audience
I am not that familiar with heckman type models and I
want to know which is the preferred marginal effect to
present in articles especially in economics/ health
economics. With heckprob, you can get marginal effects
with mfx for unconditional/ univariate probabilities
(pmargin) or mfx for conditional probabilities
(pcond). In my case my outcome equation should only
take place in the presence of the selection variable
occurring, does this mean I should use mfx for pcond?
Or should I use the mfx for pmargin since it takes
into consideration the selection effects
automatically?? I have read Greene and STATA reference
all to no avail.
Any help would be appreciated.
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