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# scikits.statsmodels.discretemod.Probit.hessian

`Probit.``hessian`(params)

  Probit model Hessian matrix of the log-likelihood

  Parameters: | params : array-like The parameters of the model
  Returns: | The Hessian evaluated at `params` :

  Notes

  where .. math:: lambda_{i}=frac{q_{i}phileft(q_{i}x_{i}^{prime}betaright)}{Phileft(q_{i}x_{i}^{prime}betaright)} and

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