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Table 3 Allocation targets

From: A simulation study for comparing testing statistics in response-adaptive randomization

Optimal allocation ratio (n 1/n 2) for maximizing powers
R Risk
R Odds /R Chisq
R Wald /R Neyman
R LLR {q 2 - p 2 exp[I 1 - I 2/(p 2 - p 1)]}/{-q 1 + p 1 exp[I 1 - I 2/(p 2 - p 1)]}
Other allocation targets
R RPW /R DL q 2/q 1
R RSIHR (Minimize the number of failure at fixed power of T Wald )
  1. I 1 = p 1 log(p 1) + q 1 log (q 1), I 2 = p 2 log(p 2) + q 2 log(q 2)