the theory purchasing power parity

The Big Mac Index is based on the theory of purchasing-power parity (PPP), which says that exchange rates should move to make the price of a basket of goods the same in each country.

巨无霸指数是建立在购买力平价理论的基础上。 购买力平价理论认为，汇率应该使得一揽子商品的价格在各个国家都相同。

It is based on the theory of purchasing-power parity (PPP), which says that exchange rates should equalise the price of a basket of goods in each country.

它是基于购买力平价理论，也就是说汇率应该使不同国家的一篮子商品的价格达到均衡。

The theory of purchasing-power parity (PPP) implies that high-inflation currenciesshould depreciate, relative to harder monies.

根据购买力平价理论推导，高通胀货币应当对低通胀者贬值。