Tsukanov (Theor. Probab. Appl. 26 (1981) 173-177) considers the regression model E(y|Z)=Fp+Zq, D(y|Z)=σ2In, where y(n×1) is a vector of measured values,F(n×k) contains the control variables, Z(n×l) contains the observed values, and p(k×1) and q(l×1) are being estimated. Assuming that Z=FL+R, where L(k×l) is non-random, and the rows of R (n×l) are i.i.d. N(0,Σ), we extend Tsukanov's results by (i) computing E(det Hp), where Hp is the covariance matrix of p̂, the l.s.e. of p, (ii) considering 'optimality in the mean' for the largest root criterion, (iii) discussing these equations when the matrix R has a left-spherical distribution.
All Science Journal Classification (ASJC) codes
- Statistics, Probability and Uncertainty
- Applied Mathematics
- Statistics and Probability