ivmodel (version 1.9.1)

model.matrix.ivmodel: Extract Design Matrix for ivmodel Object

Description

This method extracts the design matrix inside ivmodel.

Usage

# S3 method for ivmodel
model.matrix(object,...)

Value

A design matrix for the ivmodel object.

Arguments

object

ivmodel object.

...

Additional arguments to fitted.

Author

Yang Jiang, Hyunseung Kang, and Dylan Small

See Also

See also ivmodel for details on the instrumental variables model.

Examples

data(card.data)
Y=card.data[,"lwage"]
D=card.data[,"educ"]
Z=card.data[,"nearc4"]
Xname=c("exper", "expersq", "black", "south", "smsa", "reg661", 
        "reg662", "reg663", "reg664", "reg665", "reg666", "reg667", 
		"reg668", "smsa66")
X=card.data[,Xname]
foo = ivmodel(Y=Y,D=D,Z=Z,X=X)
model.matrix(foo)