Indexes help us to understand the world. Since 1986, the Economist has published the Big Mac Index, which reveals discrepancies in exchange rates, using the tasty medium of the price of a Big Mac. Guido Fawkes has attempted to revive the Misery Index, which measures how unhappy we are by combining the rates of inflation and unemployment (plus the deficit divided by GDP).
David Cameron wanted a more optimistic measure and so attempted to launch a Happiness Index, to much criticism.
The latest index thought up by the Economist goes beyond economics, however, and looks at the turmoil in the Middle East. Behold, The Shoe Thrower's Index:
There are few surprises. Yemen, Libya and Egypt, Syria and Iraq top the list, while small, oil-rich, pro-western states in the Gulf are near the bottom. The only misplaced presences appear to be Jordan, whose government has been rocked by recent events in the region, and Tunisia, which triggered the turmoil when a popular uprising removed President Ben Ali from power.
Here's how the Economist compiles the chart.
The chart below is the result of ascribing a weighting of 35% for the share of the population that is under 25; 15% for the number of years the government has been in power; 15% for both corruption and lack of democracy as measured by existing indices; 10% for GDP per person; 5% for an index of censorship and 5% for the absolute number of people younger than 25.
The events of the past few weeks have led to a flurry of speculation, not much of it evidence-based. The Shoe Thrower's Index goes some way to remedying this – albeit in a frivolous fashion. It's not foolproof, but it is fun.