Marginal Utility
Marginal Utility
The additional usefulness, satisfaction, or value a person expects from obtaining or consuming one more unit of a good or service.
Marginal utility is the additional satisfaction or value gained from consuming one additional unit of something.
Economic Choice Happens at the Margin
People rarely choose between having every possible unit of a good and having none. They usually decide whether the next unit is worth obtaining relative to its cost and alternatives.
Marginal analysis therefore focuses on the value of the next increment rather than the total usefulness of everything already owned.
What Is Marginal Utility?
Marginal utility describes the benefit a person expects from one additional unit of a good, service, or resource.
Because needs are satisfied progressively, the usefulness of an additional unit often changes depending on how many units the person already possesses.
Diminishing Marginal Utility
For many goods, additional units become less urgent as more are acquired.
Total Utility vs. Marginal Utility
The distinction prevents a common confusion about value.
The overall usefulness obtained from all units of a good.
The usefulness of the next additional unit under consideration.
Marginal Utility and Price
Market exchange occurs because individuals compare the expected value of the next unit with the opportunity cost of obtaining it.
This helps explain why a good can be extremely useful overall while an additional unit may command a relatively low price when the good is abundant.
Why It Matters for Monetary Literacy
Marginal utility helps explain subjective value, price formation, money demand, and why people choose to hold one asset rather than another.
It is especially useful for distinguishing economic value from physical usefulness alone.
Economic decisions are made one additional unit at a time, not by comparing the total usefulness of entire categories of goods.
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