This is the link that gave me the indication: https://stat.ethz.ch/pipermail/r-help/2007-March/127261.html
Are there alternative ways to deal with a high count of zeros for count data with lmer?
______________________________________________ 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.
