1. marginal utility
Wikipedia definition
2. Marginal utilityIn economics, the marginal utility of a good or service is the gain (or loss) from an increase (or decrease) in the consumption of that good or service. Economists sometimes speak of a law of diminishing marginal utility, meaning that the first unit of consumption of a good or service yields more utility than the second and subsequent units.
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Read “限界効用” on Japanese Wikipedia
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