the code is : prr <- plm( durata ~ log(attivo) + rating + main, model="random", effect="individual", data = p)
I read that code in R forge and i thought that it could be useful to anyone who red my post to help me moving around it. -- View this message in context: http://r.789695.n4.nabble.com/Error-in-Random-Effect-Panel-Negative-variance-tp4650654p4650771.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
