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Externalities and Deadweight Loss

Assume that the demand and supply for a product can be described by the following equations:

Q= 1200-4P
Q= -200+2P

Producing the product results in marginal external damage of $8 per unit.

a. What type of externality is this?

b. Showing your work, calculate difference between the competitive equilibrium quantity and the social optimal quantity.

c. What is the deadweight loss associated with this externality? What is the substantive interpretation of this externality?

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