def _mse_converged(self):
        """Check convergence based on mean squared error

        Returns
        -------

        converged : boolean
            Whether the parameter estimation converged.

        mse : float
            Mean squared error between prior and posterior.

        """

        mse = mean_squared_error(self.local_prior, self.local_posterior_,
                                 multioutput='uniform_average')
        if mse > self.threshold:
            return False, mse
        else:
            return True, mse