st: Formula of F test for Wilk's lambda in MANOVA

[<carlo.lazzaro@tiscalinet.it>]

Dear Statalisers,
in the .pdf manual of Stata 12 (page 374), the following formula of F test
for Wilk's lambda is reported:

F=((1-Lambda^1/t)*df1)/((Lambda^1/t)*df2).

However, taking a look at the same test in Rencher AC. Methods of
Multivariate Analysis.2nd ed. Wiley, 2002: 163, the formula turns the
degrees of freedom upside down:

F=((1-Lambda^1/t)*df2)/((Lambda^1/t)*df1).

Where's the bug, if any?

Thanks a lot and Kindest Regards,
Carlo

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