McCheapest: Find the cheapest Big Macs in the United States!

Economists sometimes use the Big Mac to compare cost of living between countries. It's a uniform product that uses mostly local inputs, e.g. labor, agriculture, transportation.

A cheeky economist used this to troll the Argentinian government. He published an exposé proving that Argentina was lying about its inflation rate, because the price of the Big Mac was growing much faster.

The Argentina government freaked out and worked tirelessly to resolve the situation -- not by fixing inflation, of course, but by banning McDonald's from raising Big Mac prices above the official inflation rate. To this day, the Big Mac is highly unprofitable and Argentinian McDonald's do everything they can to hide it from the menu.