The Big Mac Index: A Measure of PPP and Burger Inflation
The Big Mac was created in 1967 by Jim Delligati, a McDonald’s franchise owner in Pennsylvania. It was launched throughout the U.S. the following year, and today you can buy one in more than 70 countries. However, the price you pay will vary based on where you are, as evidenced by the Big Mac Index.
Spanning from 2004-2022, this animation from James Eagle shows the U.S. dollar price of a Big Mac in select countries around the world.
What Does the Big Mac Index Show?
The Big Mac Index was invented by The Economist in 1986. It is intended to be a lighthearted way to demonstrate the concept of purchasing power parity. In other words, it helps illustrate the idea that market exchange rates between countries may be “out of whack” when compared to the cost of buying the same basket of goods and services in those places.
Given that McDonald’s is one of the biggest companies in the world and the Big Mac is widely available globally, it means that the famous burger can be used as a basic goods comparison between most countries. It also has the advantage of having the same inputs and distribution system, with a few minor modifications (like chicken patties in India instead of beef).
Using the price of a Big Mac in two countries, the index can give an indication as to whether a currency may be over or undervalued. For example, a Big Mac costs ¥24.40 in China and $5.81 in the United States. By comparing the implied exchange rate to the actual exchange rate, we can see whether the Yuan is over or undervalued.