[R] Under-dispersion - a stats question?

[Martin Henry H. Stevens]

Hello all:
I frequently have glm models in which the residual variance is much  
lower than the residual degrees of freedom (e.g. Res.Dev=30.5, Res.DF  
= 82). Is it appropriate for me to use a quasipoisson error  
distribution and test it with an F distribution? It seems to me that  
I could stand to gain a much-reduced standard error if I let the  
procedure estimate my dispersion factor (which is what I assume the  
quasi- distributions do).

Thank you for any input at all.

Hank

Dr. Martin Henry H. Stevens, Assistant Professor
338 Pearson Hall
Botany Department
Miami University
Oxford, OH 45056

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http://www.cas.muohio.edu/~stevenmh/
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