st: runs test?

[Richard Goldstein <richgold@ix.netcom.com>]

does anyone know of a program to perform the Wald-Wolfowitz runs test
(Wald, A and Wolfowitz, J (1940), "On a test of whether two samples are
from the same population," _Annals of Mathematical Statistics_, 11:
147-162)?  I have searched in the standard Stata ways (search, hsearch,
findit), but have found nothing.

thanks,

Rich
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