statsmodels.othermod.betareg.BetaModel.hessian

BetaModel.hessian(params, observed=None)[source]

Hessian, second derivative of loglikelihood function

Parameters
paramsndarray

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.

Returns
hessianndarray

Hessian, i.e. observed information, or expected information matrix.