Please help us compile the Big Mac index

YOU only need to look at the letters page of The Economist to see how far-flung some of our readers are. We like to think that our international readership reflects our international outlook. Well, we'll soon find out if it does, because we would now like to ask you, our readers around the world, to help us in our pioneering investigation of the field of burgernomics by telling us how much a Big Mac costs where you live.

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