(This article was first published on R Tips's blog, and kindly contributed to R-bloggers)
Sorry it has been so long to write an R tip. I've been really busy with my research, which you would think would produce lots of tips, but apparently not. Anyway here is a little tip to look at.
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Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).