In article <480q62$1auj at hearst.cac.psu.edu>, Spencer Muse
<muse at kurtz.bio.psu.edu> wrote:
> Having said that, it is, of course, of no concern since we must use
> a Monte Carlo approach to evaluate the p-values anyway. And as
> another somewhat irrelevant aside, it seems that Goldman's claim
> about the unsuitability of the chi-squaare approximation was a bit
> too strong. A number of us have found this approximation to be quite
> good when yop have fully-specified null and alternative models. I
> think that slight correction might have even popped up in a Goldman
> and Yang paper somewhere along the way.
Yes, it has. Thanks for the excuse to do some publicity, Spencer:
Yang, Z., Goldman, N., & Friday, A. 1995. Maximum likelihood trees from
DNA sequences: a peculiar statistical estimation problem.
Systematic Biology 44(3):384-399.
See in particular pp.393-394 (& cf. pp.390-393).
Nick Goldman
Dept of Genetics
Univ of Cambridge
