@aic Akaike information criterion for the system.
@detresid determinant of the residual covariance matrix.
@hq Hannan-Quinn information criterion for the system.
@logl log likelihood for system.
@ncoefs total number of estimated coefficients in the var.
@neqn number of equations.
@regobs number of observations in the var.
@sc Schwarz information criterion for the system.