Citation

To cite countreg in publications use:

Zeileis A, Kleiber C (2023). countreg: Count Data Regression. R package version 0.3-0, https://R-Forge.R-project.org/projects/countreg/.

If count data regression models zeroinfl()/hurdle() are used, please cite:

Zeileis A, Kleiber C, Jackman S (2008). “Regression Models for Count Data in R.” Journal of Statistical Software, 27(8), 1–25. doi:10.18637/jss.v027.i08.

If rootogram() is used, please cite:

Kleiber C, Zeileis A (2016). “Visualizing Count Data Regressions Using Rootograms.” The American Statistician, 70(3), 296–303. doi:10.1080/00031305.2016.1173590.