Analysis of positive consumption externalities as a cause of market failure is covered in this topic revision video.
Externalities are spill-over effects from production and/or consumption for which no appropriate compensation is paid to one or more third parties affected
Externalities lie outside the initial market transaction / and are not reflected in the market price
Externalities cause market failure if the price mechanism does not take account of the social costs and benefits of production and consumption
What are Positive Consumption Externalities?
Discussion of what constitutes a positive consumption externality can involve making value judgements
There are potentially large social welfare gains from government interventions designed to increase take-up / consumption of goods and services with positive externalities
Effective behavioural nudges might help to increase consumption towards a social optimum level.
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