df.residual.aidsEst {micEconAids}

Covariance matrix of an Almost Ideal Demand System

Description

These method returns the covariance matrix of the coefficients from an Almost Ideal Demand System (AIDS).

Usage

   ## S3 method for class 'aidsEst'
df.residual( object, ... )

Arguments

object

an object of class aidsEst.

...

currently not used.

Value

The df.residual method for objects of class aidsEst returns a symmetric matrix: the covariance matrix of the coefficients.

Author(s)

Arne Henningsen

See Also

aidsEst, coef.aidsEst