what is the matrix to find the diagonal of the error what is the function of the error coefficient in an econometric model? if an econometric model includes only diagonal elements in error vectors, is this a good assumption to make is it necessary to transform an econometric model in order to have only diagonal elements in the error covariance matrix definition of error in multivariate model what does the model of a school econometric model have in common what is the idiosyncratic error what is the difference between ji and phi which term refers to the idiosyncratic error what is the function of multivariate error matrices what is the matrix of the error in phi where do you find the value of the error variable in the econometric model? when to transform econometrics what is the econometric model of error where is the error term what is econometric error what is the error in y does econometric model require a covariance matrix where are the diagonals of error matrix how to make econometric error model