py-countreg 0.0.1

Regression Models for Count Outcomes

Introduction

The package py_countreg is a collection of functions to estimate various regression models for count outcomes.

It is an ongoing project. More functionalities will come later.

Core Functions

Count Outcome Regressions
  |
  |-- Equi-Dispersion (Baseline)
  |     |
  |     `-- stdpoisson() : Standard Poisson 
  |
  |-- Over-Dispersion
  |     |
  |     |-- negbinom2()  : Negative Binomial (NB-2)
  |     |
  |     |-- hdlnegbin2() : Hurdle Negative Binomial (NB-2)
  |     |
  |     |-- zifnegbin2() : Zero-Inflated Negative Binomial (NB-2)
  |     |
  |     `-- zifpoisson() : Zero-Inflated Poisson 
  |
  `-- Over- and Under-Dispersions
        |
        |-- hdlpoisson() : Hurdle Poisson 
        |
        |-- genpoisson() : Generalized Poisson
        |
        `-- compoisson() : Conway-Maxwell Poisson 

Reference

WenSui Liu and Jimmy Cela (2008), Count Data Models in SAS, Proceedings SAS Global Forum 2008, paper 371-2008.