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.

observed : bool¶

If True, then the observed Hessian is returned (default). If False, then the expected information matrix is returned.

Returns:¶

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

Return type:¶

ndarray