sandwich.heckmanGE Sandwich Estimator for Generalized Heckman Model — sandwich.heckmanGE • heckmanGE

Computes the sandwich estimator of the variance-covariance matrix for the heckmanGE model.

Usage

sandwich.heckmanGE(x, bread. = bread.heckmanGE, meat. = meat.heckmanGE, ...)

Arguments

x: An object of class heckmanGE representing a fitted Generalized Heckman model.
bread.: A function to compute the "bread" part of the sandwich estimator. Defaults to bread.heckmanGE.
meat.: A function to compute the "meat" part of the sandwich estimator. Defaults to meat.heckmanGE.
...: Additional arguments passed to meat..

Value

A variance-covariance matrix for the heckmanGE model, computed using the sandwich estimator.