Private costs and benefits, externalities and social costs and benefits：練習題

In the context of environmental economics, which of the following is defined as the sum of marginal private costs and marginal external costs (\(MPC + MEC\))?

Which of the following scenarios best illustrates a negative consumption externality?

If the government internalizes a negative production externality by imposing a corrective tax exactly equal to the Marginal External Cost (MEC), what is the most likely effect on the market?

A person takes out comprehensive car insurance and subsequently drives more recklessly because they know the insurance company will cover the costs of any accident. This is an example of which type of market failure?

In a market for chemical production, the marginal private cost is given by \( MPC = 10 + 2Q \) and the marginal external cost is \( MEC = 0.5Q \). The marginal social benefit is \( MSB = 50 - 0.5Q \). What is the difference between the market equilibrium output and the socially optimal output?

A production process has a Marginal Private Cost (MPC) represented by the equation \( 3Q + 20 \) and a Marginal External Cost (MEC) of \( 0.5Q \). Calculate the Marginal Social Cost (MSC) when the level of output \( Q \) is \( 40 \).

The market for a specific industrial chemical is defined by a marginal private benefit of \( MPB = 150 - 2Q \) and a marginal private cost of \( MPC = 30 + Q \). If the production of this chemical generates a constant marginal external cost of \( \$30 \), calculate the value of the deadweight welfare loss that results from the market's failure to internalize this externality.

With reference to a diagram, explain how the existence of a negative externality of production causes the market equilibrium quantity to exceed the socially optimum quantity, leading to a deadweight welfare loss.

A chemical factory produces a pesticide that results in water pollution, creating a negative production externality. The market for this pesticide is characterized by the following functions:
Marginal Private Benefit: \(MPB = 200 - 2Q\)
Marginal Private Cost: \(MPC = 20 + Q\)
Marginal External Cost: \(MEC = 0.5Q\)

(a) Calculate the market equilibrium quantity and price where no government intervention exists.

(b) Calculate the socially optimum level of output and the value of the Pigouvian tax per unit that the government should impose to internalize the externality. State the resulting deadweight loss if the market remained at the private equilibrium.