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Is it generally known/has it been previously discussed here that the $aic() component in GLM-family objects (e.g. results of binomial(), poisson(), etc.) does not as implemented actually return the AIC, but rather -2*log-likelihood + 2*(model_has_scale_parameter) ? Can anyone in this forum gauge how a documentation patch would be received? This behaviour does not seem to be documented in ?family

...+ or who have read and internalized or (even co-written !) "The white book", notably Ch.6, may be able to shed a historic light on this. I note that the white book's Appendix B with function help pages, has a page ?family.object, accessible here https://sites.oxy.edu/lengyel/M150/Sueselbeck/helpfiles/family.object.html which does *not* mention a <fam>$dev.resid() component, but instead allows to use <fam>$residuals(*, residuals=TRUE) get the " vector of deviance residual, whose weighted sum of squares is the deviance " Given the above, and also the ?glm e...

...alized or (even co-written !) > "The white book", notably Ch.6, may be able to shed a historic > light on this. > > I note that the white book's Appendix B with function help > pages, has a page ?family.object, accessible here > https://sites.oxy.edu/lengyel/M150/Sueselbeck/helpfiles/family.object.html > > which does *not* mention a <fam>$dev.resid() component, but instead > allows to use <fam>$residuals(*, residuals=TRUE) > get the > " > vector of deviance residual, whose weighted sum of > squares is the deviance > &quot...