The Economist's Big Mac index is based on the theory of purchasing-power parity (PPP), the idea that exchange rates should move to equalise the prices of a basket of goods and services across different countries. Our basket is the Big Mac. For example, the cheapest burger in the chart is in China, at $1.26, compared with an average American price of $3.
Price in Norway $6.10
... I want better burgerprices!
http://www.economist.com/markets/big...ory_id=3503641