All of the following represent government spending as a part of aggregate demand except for:
A. Flood control.
B. National parks.
C. Police and fire protection.
D. Social Security checks
Answer: D. Social Security checks
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One factor which brought on the recession of 2007-2009 was the end of the housing bubble
Indicate whether the statement is true or false
The practice of potential buyers offering lower prices for a product of uncertain quality than they would for a product of certain quality is known as: a. the lemon problem. b. moral hazard
c. external costs. d. None of the above.
In the long run, large and continuing budget surpluses
a. mean higher taxes and a lower standard of living b. mean a larger money supply and higher interest rates c. are a problem because they crowd out private spending d. permit the government to lower taxes, thereby encouraging work, investment, and saving e. mean a larger money supply and lower interest rates
Refer to the information provided in Figure 13.2 below to answer the question(s) that follow. 
Figure 13.2 Refer to Figure 13.2. This firm's marginal revenue will be positive at
A. prices below $5. B. prices above $5. C. all prices. D. prices between $4 and $8.