The price of a good rises from $8 dollar to $12 , and the quantity demanded falls from 110 to 90 units. Calculated with the midpoint method, the elasticity is ( )
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Which of the following topics relates to Macroeconomics? ( )
A. a family’s decision about how much income to save
B. the effect of government regulations on auto emissions
C. the impact of higher national saving on economic growth
D. a firm’s decision about how many workers to hire
A marginal change is one that（ ）
A. a. is not important for public policy.
B. b. incrementally alters an existing plan.
C. c. makes an outcome inefficient.
D. d. does not influence incentives.
An American buys a pair of shoes manufactured in Italy. How do the U.S. national income accounts treat the transaction? ( )
A. Net exports and GDP both rise.
B. Net exports and GDP both fall.
C. Net exports fall, while GDP is unchanged.
D. Net exports are unchanged, while GDP rises.
Which is the largest component of GDP? ( )
A. consumption
B. investment
C. government purchases
D. net exports
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