Exact power curves for the two-sided Wilcoxon two-sample statistic
These curves are computed using the theory presented in my PhD-thesis
and in the paper:
M.A. van de Wiel (2001) Exact non-null distributions of rank statistics, Communications in Statistics: Simulation and Computation 16, 1011-1028.
The total sample size is N=m+n, m=n. The rejection level is approximately equal to 0.05.