Does anyone know what mathematically is going on with ycond and pcond when
using predict after Heckman and Heckprob, respectively. First, I am hoping
I can interpret these predictions as predicted values and probabilities
conditional on selection -- wages conditional on having a job or
probability of illness conditional on treatment, say. Second, I need to
recreate these given the parameters, and I can't seem to unwind what the
commands are doing. Any suggestions?
Wendy
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