Zipf Extended Distributions
Implementation of four extensions of the Zipf distribution: the Marshall-Olkin
Extended Zipf (MOEZipf) Pérez-Casany, M., & Casellas, A. (2013) , the Zipf-Poisson Extreme (Zipf-PE), the
Zipf-Poisson Stopped Sum (Zipf-PSS) and the Zipf-Polylog distributions.
In log-log scale, the two first extensions allow for top-concavity
and top-convexity while the third one only allows for top-concavity.
All the extensions maintain the linearity associated with the Zipf model in the tail.