st: exact probability of each permutation for randomization test

["Carlo Lazzaro" <carlo.lazzaro@tin.it>]

Dear All,

is there a inbuilt Stata 9/2 function to calculate the exact probability of
each R permutation for a randomization test considering two samples of
observation (n and m)?

I suppose the binomial coefficient for the exact probability should be
transformed as follows: 1/(N!/n!m!), where N! is the total number of (n+m)
R permutations.


Thanks a lot for Your Kindness and for Your time.

Kind Regards,

Carlo

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