The Big Mac Index is out again. Not much has changed. Norway’s Big Macs are most expensive and Chinese Big Macs are cheap.
What do Big Mac prices tell us? Starting with an average U.S. price of $3.73 (based on 4 cities), we can determine whether other currencies are over valued or undervalued in comparison to the dollar. So, when we see that a euro based Big Mac will cost $4.33, we know the euro is overvalued. Rather interestingly, a Brazilian Big Mac, at $4.91 is also more while Argentina’s Big Mac is very inexpensive at $1.78.
I wondered, though, whether a low price would be inexpensive domestically and discovered that we can also look at the Big Mac Index from an average net wage perspective. In March, 2009, someone buying a Big Mac in Chicago, Tokyo, or Toronto would have needed 12 minutes of work time. By contrast, workers in Nairobi, Mexico City, and Jakarta worked longer than 2 hours. The global average, based on 73 cities, was just below 40 minutes.
The Economic Lesson
As economists, the Big Mac Index takes us to purchasing power parity. A 2 page St. Louis Fed paper clearly and briefly connects the Big Mac Index to economics. Starting with a “one price” theory, they explain that price deviations can vary because of local productivity. If workers producing exports have higher wages, other workers benefit, and prices move up. Looking at supply and demand, Big Mac prices relate to the cost of local labor and the amount consumers are willing and able to spend. Does export activity relate to Brazil’s position on the list?