statsmodels.othermod.betareg.BetaModel.hessian¶
- BetaModel.hessian(params, observed=None)[source]¶
Hessian, second derivative of loglikelihood function
- Parameters:
- params
ndarray
Parameter at which Hessian is evaluated.
- observedbool
If True, then the observed Hessian is returned (default). If False, then the expected information matrix is returned.
- params
- Returns:
- hessian
ndarray
Hessian, i.e. observed information, or expected information matrix.
- hessian