Produce variance of the shocks estimated using GMM residues (sigma2_0) given the common coefficients (rho0)
get_sigma2(rho, alpha = 0, common_par_method, X_star, Y_star, Z_star,
X_mat, Y_mat, Z_mat, n_alpha)
lagged dependent variable coefficients
external variables coefficients
method for estimating common parameters
auxiliary matrix for OFD transformation
auxiliary matrix for OFD transformation
auxiliary matrix for OFD transformation
lagged dependent variable matrix
dependent variable matrix
external variable matrix
number of external variables