model.matrix.heckitrob: Design Matrix of Sample Selection Model

In ssmrob: Robust Estimation and Inference in Sample Selection Models

Description

Create design matrix of sample selection model

Usage

## S3 method for class 'heckitrob'
model.matrix(object, part = "outcome", ...)

Arguments

object	object of class heckitrob
part	character string indicating which matrix to extract: "outcome" for the outcome equation, "selection" for the selection equation.
...	currently not used

Value

If argument part is "outcome", the design matrix of the outcome equation is returned.

If argument part is "selection", the design matrix of the selection equation is returned.

Author(s)

Mikhail Zhelonkin

ssmrob documentation built on Aug. 20, 2021, 5:08 p.m.