但是，还有第三种方法：根据新的PPP指数提高贫困线，以保持全球贫困率不变（因为PPP实际上是跨国平价，不会改变全球贫困的绝对水平 ） 。
However, a third approach was possible: to raise the poverty line with the new PPP indices so that the incidence of global poverty remained unchanged (because PPP arguably tells us about parity across countries and should not change the absolute level of global poverty).