There are two individuals with demand for streetlights Qd1 = 150 − P and Qd2 = 200 − P. The market supply of streetlights is perfectly elastic at P = 130.
a. What is the price and quantity of streetlights if the market is competitive?
b. Explain why streetlights are a public good.
c. What is the socially optimal price and quantity of streetlights?
d. Using your results, why is a public good considered a market failure?