IB Economics Unit 2.3: Microeconomics - Elasticities

1#

The table below indicates the supply schf7 hnojt/fw , okuqm :*5f,pz(edule for oranges

Price(US$/dozen)	Quantity supplied (dozens)
6	20
7	28

Calculate the price elasticity of supply (PES) when the price of a dozen oranges increases from US$\$$6 to US$\$$7?

A. 4

B. 2.4

C. 0.42

D. 8

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Identify which of the following is a hl hsbvc)k,xs :2jh4:c dc9 :mdeterminant of price elasticity of supply (PES) ::)jbksx d,hhhlc9sv4c2m c:.

A. Ability to store

B. Availability of substitutes

C. Proportion of income spent

D. Degree of necessity

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Assume the price elasticity o gzf kg4:ejsp/ln/(qo p. et:(f demand (PED) for a home cleaning service changes from 1.81.8 to 1.21.2. Which of the /:g. zsng:ok /plp(e(qt4jfe following statements explain this change?
I. a competing firm increased its operating hours
II. a competing firm begins focusing on office cleaning
III. incomes of potential customers increase

A. I only

B. I and II only

C. I and III only

D. II and III only

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What market that is most likely pictured in the diagram above?

A. Pills produced by a pharmaceutical company

B. Smartphones produced by an electronics company

C. Tickets at a sporting event at a stadium

D. Barrels of oil sold by an oil company

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In the market for a good, assumeimp 4mev/(sas8:ft:p *yf+wx.ps ds + the income of consumers increases by 10% and quantity demanded of the good increases by 5%. Calculate the income elasticity of demand (YED), and state the type of go(s p:p+* t/ :evassmw 4f.fmd8ips+yxod it is.

A. YED is 0.5,Type of good is Luxury

B. YED is 0.5,Type of good is Necessity

C. YED is 2,Type of good is Normal

D. YED is 2,Type of good is Inferior

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Identify which of the following are valid reasons why the price elasticity of suw*tw fpw0c.. y a52tn ldxu0y)pply (PES) for primary commodities is generaxuty2 p0 w*5wcflw.0 ynat).dlly lower than the PES for manufactured products.

A. Primary commodities is Tend to be necessities,Manufactured products is Likely to be easier to store

B. Primary commodities is Take time to grow/extract ,Manufactured products is Tend to be luxuries

C. Primary commodities is Have few substitutes,Manufactured products is Have many substitutes

D. Primary commodities is Take time to grow/extract ,Manufactured products is Likely to be easier to store

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Rrice	Quantity demanded
US$20	100
US$21	97

Calculate the price elasticity of demand for the product in the table above when the price increases from US $\$$20 to US $\$$21.

A. 3

B. 1.67

C. 0.6

D. 0.33

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In the hypothetical country ofj 6m,5l*rxc/ s-uvd fg Smokeland, the government implements high indirect taxes on cigarettes to deter consumption. Strict regulations on advertising and promotion, coupled with public health programs funded by tax revenues, lead to r5vgx/, s djul -c6m*rfeduced smoking rates and improved public health outcomes.
Which of the following is not a possible outcome of these forms of government intervention?

A. Job losses in the tobacco industry.

B. Reductions in incomes of tobacco farmers.

C. Smuggling of cigarettes from neighbouring countries.

D. The tax burden falling disproportionately on the tobacco industry.

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The price of a product.y*iu9ef dx5m 1ndfq57j(hr k falls from $\$$30 to $\$$25, and as a result, quantity supplied decreases from 250 000 to 200 000. Calculate the PES and determine whether supply is price-elastic or price-inelastic.

A. PES values is 0.83,Price-elastic or inelastic is price-inelastic

B. PES values is 1.20,Price-elastic or inelastic is price-elastic

C. PES values is 1.20,Price-elastic or inelastic is price-inelastic

D. PES values is 0.83,Price-elastic or inelastic is price-elastic

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

For a straight-line demand curve, which of the fol+ kisa9,* sntulowing will occur when the price i9a+s, skitnu *s lowered?

A. The total revenue decreases.

B. The demand curve shifts rightward.

C. The price elasticity of demand decreases.

D. The demand curve for complements shifts leftward.

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which point on the Engel curve above identifies the situation where blankets are a luxury good?

A. choice A

B. choice B

C. choice C

D. choice D

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

For a 5% decrease in the price of a good, assume the price elasticity o6k0mufc8x l9 af demand (PED) is −1.95. Which group of outcomes below correctly determines the impact of the change in price oflx8kc 6am0u9 f the good?

A. Total revenue is Increases,Quantity demanded is Increases by 9.75%

B. Total revenue is Increases,Quantity demanded is Increases by 2.78%

C. Total revenue is Decreases,Quantity demanded is Increases by 9.75%

D. Total revenue is Decreases,Quantity demanded is Increases by 2.78%

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

	Gizmos	Whats its	Widgets
Firm A weekly production	80	70	50
Income elasticity of demand(YED)	1.2	0.6	-0.4

Assume consumers' incomes fall, and the chief operating officer of Firm A recommends reallocating production inputs to reflect changes in demand. Which of the following recommended reallocations would lead to the greatest increase in sales for Firm A?

A. produce 100 gizmos, 80 whatsits, and 20 widgets

B. produce 150 gizmos, 50 whatsits, and 0 widgets

C. produce 40 gizmos, 100 whatsits, and 60 widgets

D. produce 45 gizmos, 55 whatsits, and 90 widgets

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Oil has price inelastic supplyju9-y);l voywhr:s3p because
I. It has limited substitutes
II. It takes time to adjust production inputs
III. Production involves a high cost
IV. It is a necessity

A. I and II only

B. I and IV only

C. II only

D. II, III and IV

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15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Consumer electronics have price elam/+j)kjfg+g a stic supply because
I. They are durable and can be stored
II. They do not take a long time to produce
III. They have a lot of substitutes
IV. They are luxuries

A. I only

B. I and II only

C. II only

D. III and IV only

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16#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the following statements correctly compares the supply curves above?

A. $S_1$ has the highest elasticity of supply

B. $S_2$ has the highest elasticity of supply

C. $S_3$ has the highest elasticity of supply

D. All 3 curves have the same elasticity of supply

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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Assume that the price elasticity of53y)hekn0ak t supply is 3 when the price of a product increkn)k35y 0ht aeases from $\$$40 to $\$$42.
If the change in quantity supplied is 270, how many units of the product will suppliers produce at the current price?

A. 1800

B. 5400

C. 810

D. 264

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