How much stuff can you buy with $1? Purchasing power is the value of a dollar in terms of the amount of goods or services that one dollar can buy at a specific time. It’s heavily influenced by inflation, because inflation typically decreases the amount of goods or services you’d be able to purchase with that dollar. (It’s why $15 used to be able to get you a ticket to the movies, but that $10 could maybe buy you one third of one today.)
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