Refers to objects which are backed by a reputable source (usually a state actor) and used in lieu of barter to trade for goods and services. Originally currency was produced by containing a set amount of precious material or the promise that the object could be redeemed for a certain amount of a ...

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How can prices be compared over time?

I've just asked a question where Tyler Durden wrote in his answer that paper was expensive at Euclids time. So I wanted to ask the question: How did the price of paper / papyrus develop over ...