Purchasing power: An alternative Big Mac index

According to the August 20, 2009 Economist.com article "Purchasing power: An alternative Big Mac index," an average worker in Chicago, Toronto, or Tokyo earns enough income in 12 minutes to be able to buy a McDonald's Big Mac hamburger. In the rest of the world, workers must labor for longer periods of time to be able to afford one:

How many minutes to earn the price of a Big Mac?

THE size of your pay packet may be important, but so is its purchasing power. Helpfully, a UBS report published this week offers a handy guide to how long it takes a worker on the average net wage to earn the price of a Big Mac in 73 cities. Fast-food junkies are best off in Chicago, Toronto and Tokyo, where it takes a mere 12 minutes at work to afford a Big Mac. By contrast, employees must toil for over two hours to earn enough for a burger fix in Mexico City, Jakarta and Nairobi.

The Big Mac index

The Economist magazine uses the Big Mac Index to measure the relative purchasing power of various currencies. (Click the image below to enlarge it.)According to Economist.com:

Burgernomics is based on the theory of purchasing-power parity, the notion that a dollar should buy the same amount in all countries. Thus in the long run, the exchange rate between two countries should move towards the rate that equalises the prices of an identical basket of goods and services in each country. Our "basket" is a McDonald's Big Mac, which is produced in about 120 countries. The Big Mac PPP is the exchange rate that would mean hamburgers cost the same in America as abroad. Comparing actual exchange rates with PPPs indicates whether a currency is under- or overvalued.

The Big Mac index

The Economist magazine publishes the Big Mac index which "seeks to make exchange-rate theory more digestible. It is arguably the world's most accurate financial indicator to be based on a fast-food item."

According to Economist.com:

Burgernomics is based on the theory of purchasing-power parity, the notion that a dollar should buy the same amount in all countries. Thus in the long run, the exchange rate between two countries should move towards the rate that equalises the prices of an identical basket of goods and services in each country. Our "basket" is a McDonald's Big Mac, which is produced in about 120 countries. The Big Mac PPP is the exchange rate that would mean hamburgers cost the same in America as abroad. Comparing actual exchange rates with PPPs indicates whether a currency is under- or overvalued.

According to the magazine's January 22, 2009 print edition:

The dollar’s recent revival has made fewer currencies look dear against the Big Mac index, our lighthearted guide to exchange rates. The index is based on the idea of purchasing-power parity, which says currencies should trade at the rate that makes the price of goods the same in each country. So if the price of a Big Mac translated into dollars is above $3.54, its cost in America, the currency is dear; if it is below that benchmark, it is cheap. There are three noteworthy shifts since the summer. The yen, which had looked very cheap, is now close to fair value. So is the pound, which had looked dear the last time we compared burger prices in July. The euro is still overvalued on the burger gauge, but far less so than last summer.