Business and Vacation: CIN135

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The Economist's Big Mac index is based on the theory of purchasing-power parity, under which exchange rates should adjust to equalise the cost of a basket of goods and services, wherever it is bought around the world. Our basket is the Big Mac. The cheapest burger in our chart is in China, where it costs $1.30, compared with an average American price of $3.15. This implies that the yuan is 59% undervalued.