💶ap macroeconomics review

Function of money

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

The function of money refers to the roles that money plays in an economy, serving as a medium of exchange, a unit of account, and a store of value. These functions are essential for facilitating trade, measuring economic value, and preserving purchasing power over time. Understanding these functions helps clarify how money interacts with other economic elements, such as markets and prices.

5 Must Know Facts For Your Next Test

  1. Money must be easily divisible so that it can be used for transactions of varying sizes without losing value.
  2. For money to serve as a reliable store of value, it needs to retain its purchasing power despite inflation or other economic fluctuations.
  3. In modern economies, money is often represented by fiat currency, which has no intrinsic value but is backed by government regulation and trust.
  4. The effectiveness of money as a medium of exchange relies on general acceptance; if people do not trust or accept it, its utility diminishes.
  5. Different forms of money, like coins, paper currency, and digital currency, can fulfill the same functions but may vary in convenience and security.

Review Questions

  • How does the function of money as a medium of exchange simplify transactions in an economy?
    • The function of money as a medium of exchange simplifies transactions by providing a universally accepted method for trading goods and services. This eliminates the complications associated with bartering, where two parties must find mutual wants. With money, individuals can sell their goods for currency and use that currency to purchase what they need from others, streamlining commerce and enhancing efficiency in the economy.
  • Analyze the importance of the unit of account function of money in determining prices in an economy.
    • The unit of account function of money is crucial because it provides a consistent standard for measuring and comparing the value of different goods and services. By assigning prices to items using a common monetary unit, consumers can easily assess their worth relative to each other. This function helps facilitate informed decision-making in purchasing and allows businesses to set prices based on costs and desired profit margins.
  • Evaluate how inflation impacts the store of value function of money and what implications this has for consumers.
    • Inflation significantly affects the store of value function of money by eroding its purchasing power over time. When inflation rises, the same amount of money buys fewer goods and services than before, which can discourage savings as individuals feel their wealth diminishing. For consumers, this means they may need to invest their savings in assets that appreciate or keep pace with inflation to preserve their financial well-being. If they rely solely on cash savings, they risk losing value as inflation continues.

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