[R-sig-ME] question about degrees of freedom in lmer , library(lme4)

[m51988mnew at juno.com]

Mr. Bolker,
 Perhaps you can help me with a question about lmer  in library(lme4). 
 In SAs proc mixed there are various options for calculating degrees of
 freedom for fixed effects.
 This matters when the standard error of an estimate is a linear combination
 of mean squares, for which proc mixed provides sat and kr options.
 Does lmer have such options?
 Thank you.
 Stanley Shulman
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