Kounias, Stratis; Chalikias, Miltiadis - In: Statistics & Probability Letters 78 (2008) 15, pp. 2437-2439
An alternative criterion is presented for a linear function of the unknown parameters, in a linear model, to be estimable. If there is a linear relationship between members of a subset of the columns of the design matrix , then the parameters associated with all the columns in that subset are...