問答題 Some people read tea leaves to predict the future. We prefer hamburgers! The Economist began to calculate Big Mac index in 1986. They use it as a light-hearted guide to whether currencies are at their “correct” exchange rate. It is not intended as a precise predictor of exchange rates, but a tool to make economic theory more digestible. The following is the Big Mac Index in Apr. 25th 2002.   詳細(xì)解釋購買力平價說，說明其均衡是如何實(shí)現(xiàn)的，為何這是一個長期學(xué)說。

參考答案： 購買力平價理論三個多世紀(jì)的長期發(fā)展過程中出現(xiàn)了多種形式，其中最主要的是絕對購買力平價和相對購買力平價兩種形式；前者直接與...