@cache_readonly
    def _r2_adj_raw(self):
        """Returns the raw r-squared adjusted values."""
        nobs = self._nobs
        factors = (nobs - 1) / (nobs - self._df_raw)
        return (1 - self._r2_raw) * factors - 1
dataset/ETHPy150Open pydata/pandas/pandas/stats/plm.py/PanelOLS._r2_adj_raw/swapped operands of `-`