Abstract

The problem of efficiency and universal optimality of RMDs has been widely studied in the literature. Recently, Rajab et al. proposed CBRMDs for equal, two, three, and four different period sizes. In this article, the universal optimality of the proposed designs by Rajab et al., by using the Method of cyclic shifts (Rule I), have been proved under three different models. The information matrices for both direct and residual effects of these designs have also been expressed in the simple form which can be further used for proving conditions of universal optimality. Lastly, the construction of optimal designs through generators has been mentioned.

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