> Most shocking discovery: The variation in the prices of Dunkin Donuts in different neighborhoods. I always order an extra large Vanilla coffee, and the price within Manhattan ranges from as low as $1.64 to as high as $2.57. In one neighborhood, I even saw two Dunkin Donuts within 0.25 mile of one another, both in a similarly depressed neighborhood, at which the price differed by 58 cents! Also shocking is how some of them add tax on top of the menu price while others do not. Amazing... I suggest the Dunkin Donuts index might be slightly more sensitive in general than the McDonald's Big Mac index so often used to compare cost of living to salary in different places!!!

Here's a map of Starbucks, McD's, and Dunkin Donuts in New York, based off of the city's health inspection records:

http://www.smalldatajournalism.com/projects/one-offs/fusion-...

Dunkin Donuts are so uniformly spread out (Starbucks is heavily clustered in lower Manhattan) I've always thought it'd be interesting to use them as some kind of marker of comparison...either between neighborhoods or between cities. I never thought the different franchises would have wildly varying prices.