statsmodels.discrete.truncated_model.TruncatedLFPoisson.hessian¶ TruncatedLFPoisson.hessian(params)¶ Generic Truncated model Hessian matrix of the loglikelihood Parameters:¶ params : array-like¶The parameters of the model Returns:¶ hess – The Hessian, second derivative of loglikelihood function, evaluated at params Return type:¶ ndarray, (k_vars, k_vars) Notes