Perceived marginal private benefit
Definition. Perceived marginal private benefit is the benefit a consumer believes they gain from consuming an additional unit of a good, which may differ from the true marginal private benefit when the consumer has imperfect information. With merit goods, consumers underestimate the benefit, so perceived MPB lies below true MPB.
Because decisions are based on perceived rather than actual benefit, merit goods are underconsumed and demerit goods overconsumed relative to the socially optimal level, contributing to market failure.
This term belongs to Merit and Demerit Goods in A Level Economics. Read the full chapter for the diagrams, worked examples and exam technique.
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