quantity theory

noun

: a theory in economics: changes in the price level tend to vary directly with the amount of money in circulation and the rate of its circulation

Examples of quantity theory in a Sentence

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By ignoring the quantity theory of money and employing neo-Keynesian macroeconomic models, central bankers are often wrong-footed. Nino Paoli, Fortune, 21 Aug. 2025 Leaving aside such omissions, what does the quantity theory of money have to say about inflation? John Greenwood, National Review, 15 Jan. 2024 In context, Friedman wasn’t saying that the quantity theory of money had been unsuccessful and that there is no relationship between the money supply, broadly measured, and inflation. WSJ, 22 Jan. 2023

Word History

First Known Use

1888, in the meaning defined above

Time Traveler
The first known use of quantity theory was in 1888

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Cite this Entry

“Quantity theory.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quantity%20theory. Accessed 5 Jul. 2026.

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