Returns the coefficients of the robust two-stage estimator for simple Heckman's selection model or switching regression model.
# S3 method for heckit5rob
coef(object, ...)
object of class "heckitrob
" or "heckit5rob
"
currently not used
Returns a list of two (censored) or three (switching) vectors of parameters of two stages.
coefficients of the selection equation.
coefficients of the outcome equation(s).