method
GenericLikelihoodModelResults.
covjhj
covariance of parameters based on HJJH
dot product of Hessian, Jacobian, Jacobian, Hessian of likelihood
name should be covhjh
statsmodels.base.model.GenericLikelihoodModelResults.covjac
statsmodels.base.model.GenericLikelihoodModelResults.df_modelwc