Dear Tarquinio On 29 Jun 2013 21:01, "Tarquinio magalhaes" <tarq...@yahoo.com.br> wrote: > Is it possible > to run SUR with weights using systemfit? I mean weighted seemingly unrelated > regression (weighted SUR)
Currently, systemfit cannot estimate (SUR) models with observation-specific weights :-( > or weighted nonlinear unrelated regression (weighted NSUR). We are still not yet finished with implementing nonlinear models in systemfit (see http://www.systemfit.org/) :-( > Parresol (2001) in his paper > titled Additivity of nonlinear biomass > equations has run weighted NSUR using PROC MODEL (SAS institute Inc.1993). > I was wondering if r can do that. Unfortunately not (see above). As several people have asked for observation-specific weights and NSUR, I should perhaps start a crowd-funding initiative for implementing these features. BTW: You can ask questions that are specific to systemfit via the help forum at systemfit's R-Forge site: https://r-forge.r-project.org/projects/systemfit/ Best wishes, Arne [[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.
