Qian, Hailong; Bednarek, Heather L. - In: Economics Bulletin 35 (2015) 1, pp. 338-348
) models. Using the GMM interpretation of the usual OLS and GLS/FGLS estimation of regression coefficients in SUR models, we … derive the necessary and sufficient condition for the equal asymptotic efficiency of the OLS and FGLS estimators of a subset … OLS and GLS/FGLS estimators of the whole coefficient vector (see for example, Dwivedi and Srivastava, 1978) to the …