The Big Mac Index is published by The Economist as an informal and light-hearted way of measuring the purchasing power parity (PPP) between two currencies and provides a rule of thumb to see the relative cost of the same item in different countries.
If you want to buy a Big Mac, look how much it is in Switzerland compared to Egypt. How to use this? Think of retirement. If you are in the US with $1 take it to Egypt and it goes 3.5 times as far ($1 in the US is like $3.5 in Egypt).
(this post has been updated for 2021)
Founder of Goldzone Group and the primary author of Renaissance for Leaders. Harrison’s work focuses on the study of leadership and the conditions that shape human performance and decision-making.