df.residual.aidsEst function

Covariance matrix of an Almost Ideal Demand System

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

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

Arguments

• object: an object of class aidsEst.
• ...: currently not used.

Returns

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