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Hello, I saw that this question has been asked here before but couldn't find an answer. Are the raw datasets in R in the public domain? Most are based on quite old "classic" published results, so I would then assume that the raw data is public domain rather than GPL. Can anyone answer this definitively, or is this maybe a question for R-devel? Cheers, Skipper

Hello all, I hope this question is appropriate for this ML. Basically, I am wondering if when you create a new variable, if the variable holds some information about how it was created. Let me explain, I have the following code to replicate an example in a textbook (Greene's Econometric Analysis), using the systemfit package. dta <-

Hello all, I was wondering if someone can enlighten me as to the difference between the logLik in R vis-a-vis Stata for a GLM model with the gamma family. Stata calculates the loglikelihood of the model as (in R notation) some equivalent function of -1/scale * sum(Y/mu+log(mu)+(scale-1)*log(Y)+log(scale)+scale*lgamma(1/scale)) where scale (or dispersion) = 1, Y = the response variable, and mu