@cache_readonly
    def _rmse_raw(self):
        """Returns the raw rmse values."""
        # X = self._x.values
        # Y = self._y.values.squeeze()

        X = self._x_trans.values
        Y = self._y_trans.values.squeeze()

        resid = Y - np.dot(X, self._beta_raw)
        ss = (resid ** 2).sum()
        return np.sqrt(ss / (self._nobs - self._df_raw))
dataset/ETHPy150Open pydata/pandas/pandas/stats/plm.py/PanelOLS._rmse_raw/original