statsmodels.genmod.families.links.NegativeBinomial.inverse_deriv¶

method

NegativeBinomial.inverse_deriv(z)[source]¶

Derivative of the inverse of the negative binomial transform

Parameters

zarray-like: Usually the linear predictor for a GLM or GEE model

Returns

g^(-1)’(z)array: The value of the derivative of the inverse of the negative binomial link