statsmodels.genmod.families.links.nbinom¶

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

The negative binomial link function.

Notes

g(p) = log(p/(p + 1/alpha))

nbinom is an alias of NegativeBinomial. nbinom = NegativeBinomial(alpha=1.)

Methods

`deriv`(p)	Derivative of the negative binomial transform
`deriv2`(p)	Second derivative of the negative binomial link function.
`inverse`(z)	Inverse of the negative binomial transform
`inverse_deriv`(z)	Derivative of the inverse of the negative binomial transform
`inverse_deriv2`(z)	Second derivative of the inverse link function g^(-1)(z).