class statsmodels.genmod.families.links.NegativeBinomial(alpha=1.0)[source]

The negative binomial link function

Parameters
alphafloat, optional

Alpha is the ancillary parameter of the Negative Binomial link function. It is assumed to be nonstochastic. The default value is 1. Permissible values are usually assumed to be in (.01, 2).

Methods

 __call__(p) Negative Binomial transform link function Derivative of the negative binomial transform Second derivative of the negative binomial link function. Inverse of the negative binomial transform Derivative of the inverse of the negative binomial transform Second derivative of the inverse link function g^(-1)(z).

Methods

 Derivative of the negative binomial transform Second derivative of the negative binomial link function. Inverse of the negative binomial transform Derivative of the inverse of the negative binomial transform Second derivative of the inverse link function g^(-1)(z).