The graph below illustrates the market for a good that generates a significant external benefit for society. The 'MC' curve represents the marginal cost of production, the 'MPB' curve represents the marginal private benefit to consumers, and the 'MSB' curve represents the marginal social benefit, which includes both private and external benefits. The market, left to itself, produces at quantity Qm. To correct for the market failure and achieve the socially optimal output level, Q*, what is the value of the per-unit subsidy that the government should implement?

[Image of a standard supply and demand graph for a positive externality. The x-axis is 'Quantity' and the y-axis is 'Price/Benefit/Cost'. There is an upward-sloping Marginal Cost (MC) curve. There are two downward-sloping benefit curves: a lower Marginal Private Benefit (MPB) curve and a higher Marginal Social Benefit (MSB) curve. The intersection of MC and MPB defines the market equilibrium at price P_m and quantity Q_m. The intersection of MC and MSB defines the social optimum at price P_s and quantity Q_s. The vertical distance between MSB and MPB at Q_s is labeled as the 'Optimal Subsidy'. For the purpose of this question, assume the following values: Q_m = 800, P_m = $30. Q_s = 1000, P_s = $35. At Q_s=1000, the value on the MPB curve is $25.]

Market Intervention for Pollinators

Analyzing Market Failure in Research and Development

Analyzing the Impact of an Imperfect Subsidy

A corrective subsidy for a good that generates positive external benefits achieves the socially optimal output level by directly lowering the producers' marginal cost of production, thereby shifting the supply curve to the right.

The market for university education is often cited as having a significant positive externality, as a more educated populace leads to benefits for society as a whole (e.g., higher innovation, lower crime rates) beyond the private benefits gained by the students themselves. Assuming no government intervention, the market will produce a quantity of education that is less than the socially optimal level. Which of the following government actions would most effectively correct this specific market failure?

Calculating the Optimal Subsidy for Public Health

The production of a specific type of fire-resistant home insulation provides a benefit to the community by reducing the risk of fire spreading to neighboring properties. However, the market, operating on its own, produces less of this insulation than the amount that would be most beneficial for society as a whole. Which of the following government policies would be most effective at correcting this situation and achieving the socially optimal level of production?

Evaluating Subsidy Policies for Urban Green Spaces

Analyzing the Welfare Effects of a Green Energy Subsidy