The table above gives the demand for a monopolist's output. What is the marginal revenue when output is increased from 5 to 6 units?
A) $18
B) $4
C) $3
D) -$2
D
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________ is gross investment minus ________
A) The capital stock; net investment B) The capital stock; depreciation C) Depreciation; replacement investment D) Net investment; depreciation
This graph depicts the demand for a normal good. 
A movement from A to C in the graph shown might be caused by:
A. a decrease in price. B. an increase in price. C. a decrease in income. D. an increase in income.
Arnold Harberger was the first economist to estimate the loss of economic efficiency due to market power. Harberger found that
A) the loss of economic efficiency in the U.S. economy due to market power was less than 1 percent of the value of production. B) because of the increase in the average size of firms since World War II, the loss of economic efficiency has been relatively large, about 10 percent of the value of total production in the United States. C) although the number of monopolies was small, the large number of other non-competitive firms in the United States resulted in a large loss of economic efficiency, about 20 percent of the value of total production. D) the loss of economic efficiency in the U.S. economy due to market power was small around 1973, about 1 percent of the value of production, but has since grown to about 10 percent.
Entry into a monopolistic competitive industry
A) is easy. B) is hard. C) requires governmental approval. D) requires collusion.