Bischoff, Wolfgang; Cremers, Heinz; Fieger, Werner - In: Journal of Multivariate Analysis 36 (1991) 1, pp. 1-17
In a linear model Y = X[beta] + Z a linear functional [beta] -- [gamma]'[beta] is to be estimated under squared error loss. It is well known that, provided Y is normally distributed, the ordinary least squares estimation function minimizes the risk uniformly in the class of all equivariant...