Optimal allocation matrices for cross‐sectional designs with D = 2. The optimal allocation matrices in the case
,
,
, and σ
2 = 1, with w = 0 and β = 1 are shown for a range of possible values of E(ρ). No restrictions are placed on
other than the identifiability of Equation (1). Each allocation matrix was identified via our exhaustive search method and matches that identified by previous research