Description Usage Arguments Value Author(s) See Also
View source: R/vcov.heckitrob.R
Extract the variance covariance matrix of the robust sample selection model fit
1 2 |
object |
object of class " |
... |
currently not used |
Variance covariance matrix of the second stage. Variance covariance matrix of the selection stage can be extracted using the vcov
function for the probit estimator, e.g. vcov(heckitrob.object$stage1)
.
Mikhail Zhelonkin, Marc G. Genton, Elvezio Ronchetti
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