A marginal benefit change in a consumer's advantage if they use an additional unit of a good or service.
A marginal benefit usually declines as consumption increases. For example, the consumer may buy one ring for $100, but only willing to buy another if the second ring is $50. The consumer's marginal benefit reduces from $100 to $50 from the first to the second good.
"My adversary is the world of finance." ~ Francois Hollande
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