Baltagi,Badi H. Econometrics / by Badi H. Baltagi - 2nd ed. - New York: Springer , 1999. - xiv,396p. ISBN: 3540780742 Subjects--Topical Terms: Economics Gauss Newton RegressionHeteroskedasticityStochastic Dewey Class. No.: 330.1543 / BAL/E