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Menu cost
In economics, a menu cost is the cost incurred by a firm when changing its prices. The concept is one microeconomic explanation for the stickiness of prices in the macroeconomy, particularly emphasized by New Keynesian economists.
Fiat currenciesNominal rigidity
In economics, nominal rigidity, also referred to as price stickiness or wage stickiness, describes a situation in which a nominal price is slow to adjust or resistant to change. Complete nominal rigidity occurs when a price remains fixed in nominal terms for a relevant period of time. For example, the price of a good may be contractually set at $10 per unit for an entire year, regardles