Pecuniary externality
A pecuniary externality is an externality which operates through prices. For example, an influx of city-dwellers buying second homes in a rural area can drive up house prices, making it difficult for young people in the area to get onto the property ladder. This is in contrast with real externalities which have a direct impact on a third party. For example, pollution from a factory directly harms the environment. Both Pecuniary and real externalities can be either positive or negative.
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