Which term describes the total cost to society, including private costs and any external costs?

• A. Private Cost
• B. Private Benefit
• C. Social Cost
• D. Social Benefit

Answer: (C)

The main idea is the total cost to society, which combines what the producer or consumer pays (private costs) with any costs imposed on others (external costs). Private cost is the expense borne by the producer or buyer in making or using a good. External costs are the side effects or harms that affect people who aren’t directly involved in the transaction, like pollution, noise, or health impacts. When you add these external costs to private costs, you get the social cost.

This matters because if external costs exist, the market’s private cost understates the true burden on society, leading to outcomes that aren’t socially optimal. Policies like taxes or regulations aim to raise private costs to match social costs, encouraging decisions that reflect the full impact on everyone.

Why the other terms don’t fit: private cost covers only the direct costs to the producer or consumer, not the spillover to others; private benefit is the gain to individuals, not costs; social benefit is the total benefits to society, not the total costs. So the term that describes the total cost to society, including private and external costs, is social cost.