题目内容

Suppose the supply curve for a good is vertical. We know that supply is

A. . price elastic.
B. . perfectly price inelastic.
C. . unit price elastic.
D. . perfectly price elastic.

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If the percentage change in the quantity supplied of a good is less than the percentage change in price, then supply of the good is

A. . elastic.
B. . inelastic.
C. . normal.
D. . inferior.

Suppose the cross-price elasticity of demand is a negative number. We know that

A. . the two goods are complements.
B. . the two goods are substitutes.
C. . the two goods are inferior goods.
D. . the two goods are normal goods.

The income elasticity of demand for good X is estimated to be -0.5. This suggests that good X is

A. . a complementary good.
B. . a substitute good.
C. . a normal good.
D. . an inferior good.

The local movie theater lowers admission prices in an attempt to increase its revenues. The managers of the theater must believe demand to be

A. . unit price elastic.
B. . perfectly price inelastic.
C. . price elastic.
D. . price inelastic.

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