statsmodels.discrete.discrete_model.NegativeBinomialP.hessian_factor¶ NegativeBinomialP.hessian_factor(params)[source]¶ Generalized Negative Binomial (NB-P) model hessian maxtrix of the log-likelihood Parameters:¶ params : array-like¶The parameters of the model Returns:¶ hessian – The hessian matrix of the model. Return type:¶ ndarray, 2-D