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Social Cost

Social cost refers to the total cost to society of an economic activity, including both private costs (borne by producers or consumers) and external costs (imposed on third parties). It reflects the full impact of production or consumption, not just the market price.

In the UK, a clear example is road traffic pollution. When people drive cars, they pay for fuel and maintenance (private costs), but their actions also contribute to air pollution, congestion, and public health issues, which are external costsborne by society. The total of these is the social cost.

Another example is alcohol consumption. While individuals pay for drinks (private cost), excessive drinking can lead to NHS expenses, crime, and reduced workplace productivity—creating external costs.

If social costs exceed private costs, markets may overproduce harmful goods. Governments may intervene through taxes, regulations, or public awareness campaigns to reduce the gap and improve overall welfare.

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