Because of the law of diminishing returns, _____
a. economic growth rate begins to diminish as capital deepening increases
b. GDP per capita decreases as capital per unit of labor decreases
c. the average cost of production decreases as output in an economy increases
d. the marginal cost of production decreases as output in an economy increases
a
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The share of the personal income tax paid by the bottom half of earners
a. rose to an all-time high in 2010. b. was substantially higher in 2010 than during the 1960s and 1970s. c. was substantially lower in 2010 than during the 1960s and 1970s. d. has been relatively constant during the last four decades.
The share of Americans who pay no personal income tax
a. has been relatively constant at approximately 33 percent throughout 1975-2010. b. was relatively constant near 33 percent between 1975 and 2000 . but it has increased during the past decade, reaching nearly half of adult Americans in 2010. c. was relatively constant near 33 percent between 1975 and 2000 . but it has fallen during the past decade, receding to only 18 percent in 2010. d. rose steadily from 18 percent in 1975 to nearly 50 percent of adult Americans in 2000 . but it receded to less than 40 percent in 2010.