money & economicsanalysisWikipedia

Most people judge pay by its face value, not its buying power, a bias called money illusion

the gist

Money illusion is the habit of thinking about money in nominal terms, meaning its face value, rather than its real purchasing power. A 2% pay cut with no inflation feels unfair, while a 2% raise in a year with 4% inflation feels fair, even though both leave you with the same real income. Economists dispute how far people really fall for this, since rational people should think in real prices. Experiments by Shafir, Diamond and Tversky found the effect in several settings. Irving Fisher wrote about it in 1928, and John Maynard Keynes popularised it.

so what

Money illusion helps explain why wages and prices are sticky, and why contracts are rarely indexed to inflation. It also shapes how people react to inflation and to pay changes.

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Illustrative photo · Federal Reserve Economic Database (FRED), U.S. Bureau of La…, Public domain, via Wikimedia Commons