Which policy tool is most directly aimed at correcting a negative externality such as pollution?

Which policy tool is most directly aimed at correcting a negative externality such as pollution?

• A. Subsidies to polluting firms.
• B. Deregulation.
• C. A subsidy to education about pollution.
• D. A tax on polluting activities.

Answer: (D)

Negative externalities occur when the social cost of a activity, like pollution, is higher than the private cost faced by the producer. A tax on polluting activities, known as a Pigouvian tax, directly addresses this by making the polluter pay for the damage they cause. By imposing a per-unit charge on pollution, the private cost faced by the producer rises to reflect the social cost, creating a financial incentive to reduce emissions. The level of pollution then moves toward the socially optimal point where the marginal private cost plus the tax equals the marginal social cost. This not only discourages pollution but also generates revenue that can be used to offset or remedy the damages. Subsidies to polluting firms would lower their costs and encourage more pollution, which worsens the problem. Deregulation reduces controls and can allow more pollution regardless of outcomes. A subsidy to education about pollution helps awareness but doesn’t change the actual incentives or the amount polluters emit. The tax on polluting activities is the most direct way to internalize the external costs and reduce pollution.

Negative externalities occur when the social cost of a activity, like pollution, is higher than the private cost faced by the producer. A tax on polluting activities, known as a Pigouvian tax, directly addresses this by making the polluter pay for the damage they cause. By imposing a per-unit charge on pollution, the private cost faced by the producer rises to reflect the social cost, creating a financial incentive to reduce emissions. The level of pollution then moves toward the socially optimal point where the marginal private cost plus the tax equals the marginal social cost. This not only discourages pollution but also generates revenue that can be used to offset or remedy the damages.

Subsidies to polluting firms would lower their costs and encourage more pollution, which worsens the problem. Deregulation reduces controls and can allow more pollution regardless of outcomes. A subsidy to education about pollution helps awareness but doesn’t change the actual incentives or the amount polluters emit. The tax on polluting activities is the most direct way to internalize the external costs and reduce pollution.