Baltagi, Badi H. - In: Statistics & Probability Letters 8 (1989) 5, pp. 457-461
This paper considers three examples from the statistics and econometrics literature where OLS is BLUE and demonstrates the easiness of verifying this result with the necessary and sufficient condition (NSC) derived by Zyskind (1967) and more recently Milliken and Albohali (1984). In particular,...