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The price of a Big Mac in the United States is $3.99 whereas it is 20 yuan in China. The current exchange rate is $1:7

The price of a Big Mac in the United States is $3.99 whereas it is 20 yuan in China. The current exchange rate is $1:7 yuan.

  1. What do the data above suggest?
  2. If purchasing power parity (law of one price) holds, what should be the exchange rate between China and the United States?
  3. Now, what if the data change (the price of a Big Mac) from $4.25 whereas it is 30 yuan in China? The exchange rate is now $1:6 yuan. What has happened, and is it what you would expect based on purchasing power parity?

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