A further remark on testing linear inequality constraints in the standard linear model

In this paper we will show that the expressions obtained by Hillier (1986) for the null distribution of the likelihood ratio test of zero restrictions on nonnegative regression coefficients in the standard linear model are the same as those reported by Farebrother (1986).     

Mnemonics for the Kalman filter covariance updating formulas

In this paper we note that the numerous formulas for updating the Kalman fiter covariance matrices given by Schneider (1988) may be summarised by two partitioned inversion formulas.