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

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