Utilities, of course, want to drive down the cost of everything from paperclips to borrowing.

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People offered the banknote believed, on average, that they could use it to buy 83 paperclips, 72 napkins or 46 sweets.

ECONOMIST: The value of a coin or banknote depends on its familiarity

Besides some lint and paperclips, does it contain the supplies that will rescue you from injury, stress, stains, bad breath or worse?

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Those offered the coin thought 39 paperclips, 51 napkins or 27 sweets.

ECONOMIST: The value of a coin or banknote depends on its familiarity