statsmodels.genmod.families.links.nbinom

class statsmodels.genmod.families.links.nbinom(alpha=1.0)

The negative binomial link function.

Notes

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

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

Methods

__call__(p)	Negative Binomial transform link function
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).