All of the following generate positive externalities EXCEPT
A) public health programs.
B) lower marginal tax rates.
C) requiring proof of inoculation before entering college.
D) requiring proof of inoculation before entering elementary school.
B
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Suppose a monopolist faces the demand curve shown below. 
This demand curve can be used to determine:
A. the impact of advertising on demand. B. the monopolist's total revenue at different price and quantity combinations. C. the total cost associated with producing different levels of output. D. the marginal cost associated with producing different levels of output.
If the nominal interest rate is 8 percent and the inflation rate is 2 percent, the real interest rate is approximately
A) 4 percent. B) 6 percent. C) 0.25 percent. D) 10 percent.
Assume that the expectation of declining housing prices cause households to reduce their demand for new houses and the financing that accompanies it. If the nation has low mobility international capital markets and a flexible exchange rate system, what happens to the real risk-free interest rate and the nominal value of the domestic currency in the context of the Three-Sector-Model?
a. The real risk-free interest rate rises, and nominal value of the domestic currency falls. b. The real risk-free interest rate falls, and nominal value of the domestic currency falls. c. The real risk-free interest rate rises, and nominal value of the domestic currency remains the same. d. The real risk-free interest rate falls, and nominal value of the domestic currency rises. e. There is not enough information to determine what happens to these two macroeconomic variables.
The existence of positive economic profits induces firms to:
A. enter an industry, which shifts the market supply curve to the left and decreases market price. B. enter an industry, which shifts the market supply curve to the right and decreases market price. C. exit an industry, which shifts the market supply curve to the right and decreases market price. D. enter an industry, which shifts the market supply curve to the right and increases market price.