Hello, By fixing log_vraisemblance, gradient and hessian function linked to a family density like exp(theta.xi), I'm looking for some efficients estimators by PML.
So I've seen optim,nlminb, et maxLik procedure. But I 'm not sure that the heteroscedacity of my estimators are considered. Does anyone has been deal with kind of problem? Thanks for your help. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.