'Reshape coefficients to be more amenable to dynamic calculations
Returns
coefs : (time_periods x lag_order x neqs x neqs)'

@cache_readonly
def _coefs_raw(self):

    coef_panel = self.coefs.copy()
    del coef_panel['intercept']
    coef_values = coef_panel.swapaxes('items', 'major').values
    coef_values = coef_values.reshape((len(coef_values), self.lag_order, self.neqs, self.neqs))
    return coef_values
