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【判断题】
Commercial invoice need not be signed.A.
正确
B.
错误
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举一反三
【单选题】Income elasticity of demand measures how
A.
the quantity demanded changes as consumer income changes.
B.
consumer purchasing power is affected by a change in the price of a good.
C.
the price of a good is affected when there is a change in consumer income.
D.
many units of a good a consumer can buy given a certain income level.
【单选题】The income elasticity of demand is the
A.
absolute change in quantity demanded resulting from a one unit increase in income.
B.
percent change in quantity demanded resulting from the absolute increase in income.
C.
percent change in quantity demanded resulting from a one percent increase in income.
D.
percent change in income resulting from a one percent increase in quantity demanded.
E.
percent change in income resulting from a one percent increase in price.
【单选题】The income elasticity of demand is largest for
A.
food.
B.
clothing.
C.
shelter.
D.
luxuries.
【简答题】Income elasticity of demand
【单选题】Assume the price elasticity of demand for tobacco is 0.5, and the income elasticity of demand for tobacco is 0.4. Then:
A.
an increase in the price of tobacco will decrease total revenue from sales of tobacco.
B.
a 20% increase in the price of tobacco will decrease the quantity demanded of tobacco by 8%.
C.
tobacco is an inferior good.
D.
a 50% increase in income will increase the quantity demanded of tobacco by 20%.
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