Information facilitates exchange by fostering competition

The IS curve is Y = 20 - 1.5r, and the aggregate demand curve is Y = 15.5 - 0.3?. When the inflation rate is 3 percent, output is ________

A) 20 B) 14.6 C) 9.5 D) 3.6 E) none of the above

Suppose the government imposes a per unit tax on an item whose production process creates a negative externality. Suppose the tax is exactly the value of the marginal externality cost. If the government now uses the tax revenue to clean up pollution from this process, the market will:

a. have internalized all costs and benefits. b. be inefficient. c. be destroyed. d. not have failed. e. be subject to obligatory controls.