該指數可用來探究購買力平價(purchasing power parity)的經濟概念,即在自由市場的條件下,以相同貨幣計價的一種產品在不同國家的價格應該相同。
This entry passed through the Full-Text RSS service — if this is your content and you're reading it on someone else's site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers. Five Filters recommends: