esr_loss                Joint Loss Function
esreg                   Joint Quantile and Expected Shortfall
                        Regression
estfun.esreg            Estimating function
lambda_matrix           Lambda Matrix
sigma_matrix            Sigma Matrix
vcov.esreg              Covariance Estimation
vcovA                   Asymptotic Covariance Estimation
vcovB                   Bootstrap Covariance Estimation
