
When the supply curve is also the marginal

Explanation of Solution
In the case of positive externalities, the supply curve is also the marginal cost curve because the production or consumption of a product benefits the third party but it is not directly considered in the market transaction as it indirectly involves in the transactions or indirectly provides benefits to the society.
In case of negative externalities these curves would not be the same because here, the production or consumption of goods costs the third party in the market.
A specific measure that indicates the difference between these curves is the marginal social cost curve represents the data by covering both marginal external and marginal private cost and the marginal private cost is the supply curve of the firm.
Introduction: The benefits which are obtained by the third party who is not buying, selling, or consuming the good are called external benefits. For example, using a vehicle to travel that reduces the congestion on the road because it provides benefit to other drivers so that they can drive quickly and safely.
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Chapter 75 Solutions
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