40 years of burgernomics The Big Mac index forged by @economist.com in London in 1986 will be 40 years old in September. What began as a playful thought experiment has taken on a life of its own. It has amused readers, intrigued currency traders and irritated central banks:

What the Big Mac index reveals about a global currency beefIt highlights economic problems—and helps explain how to solve themwww.economist.com