📚 Learning Guide
Subsidies for Positive Externalities
hard

In a market where a positive externality exists, how does a subsidy impact the equilibrium quantity and social efficiency?

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Choose the Best Answer

A

It increases the equilibrium quantity and aligns private costs with social costs.

B

It decreases the equilibrium quantity but creates a surplus.

C

It has no effect on equilibrium quantity since externalities are private matters.

D

It increases the equilibrium quantity, but private costs remain higher than social costs.

Understanding the Answer

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Answer

A positive externality occurs when a product or activity benefits people who are not directly involved in it, like when someone plants trees that improve air quality for everyone. In such a market, the equilibrium quantity of the good is usually lower than what is socially optimal because the benefits to society are not fully reflected in the market price. When the government provides a subsidy for the good, it lowers the cost for producers or consumers, encouraging more production or consumption of that good. This increase in quantity helps align the private market with the social benefits, leading to greater social efficiency. For example, if the government subsidizes education, more people might attend school, leading to a more educated workforce that benefits society as a whole.

Detailed Explanation

A subsidy helps lower the cost for producers. Other options are incorrect because This answer suggests that a subsidy would reduce the amount produced; This choice implies that externalities don't matter in production decisions.

Key Concepts

Positive Externalities
Subsidies
Market Efficiency
Topic

Subsidies for Positive Externalities

Difficulty

hard level question

Cognitive Level

understand

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