How markets work Flashcards

(49 cards)

1
Q

What is the basic assumption of rational economic decision making?

A

That consumers aim to maximise utility, and firms aim to maximise profits.

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2
Q

What causes a movement along the demand curve?

A

A change in the price of the good or service.

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3
Q

What causes a shift of the demand curve?

A

A change in non-price factors such as:
• Income
• Tastes and preferences
• Price of substitutes and complements

• Population size

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4
Q

What is the law of diminishing marginal utility?

A

As more units of a good are consumed, the additional satisfaction (utility) gained from each extra unit decreases.

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5
Q

How does diminishing marginal utility influence the shape of the demand curve?

A

It creates a downward-sloping demand curve – as quantity increases, consumers are willing to pay less for additional units.

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6
Q

What is Price Elasticity of Demand (PED)?

A

A measure of how much quantity demanded changes in response to a change in price.

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7
Q

What is the formula for PED?

A

PED = % change in quantity demanded
/ % change in price

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8
Q

What does it mean if PED > 1?

A

Elastic demand – consumers are responsive to price changes.

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9
Q

What does it mean if PED < 1?

A

Inelastic demand – consumers are not very responsive to price changes.

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10
Q

What are the factors affecting PED?

A

• Availability of substitutes
• Necessity vs luxury
• Proportion of income spent
• Time period
• Habitual consumption
.Addiction

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11
Q

What is Income Elasticity of Demand (YED)?

A

A measure of how much demand changes in response to a change in income.

YED = (% change in quantity demanded) / (% change in income)

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12
Q

What does positive YED indicate?

A

The good is a normal good – demand rises as income rises.

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13
Q

What does negative YED mean?

A

The good is an inferior good – demand decreases as income rises.

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14
Q

What is Cross Elasticity of Demand (XED)?

A

A measure of how the quantity demanded of one good responds to a change in the price of another good.

XED = (% change in quantity demanded of Good A) / (% change in price of Good B)

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15
Q

What does a positive XED indicate?

A

The goods are substitutes – an increase in the price of one increases demand for the other.

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16
Q

What does a negative XED indicate?

A

The goods are complements – an increase in the price of one decreases demand for the other.

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17
Q

What is supply in economics?

A

The quantity of a good or service that producers are willing and able to sell at a given price, over a given period of time.

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18
Q

What is the law of supply?

A

As the price of a good increases, the quantity supplied also increases (ceteris paribus).

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19
Q

What causes a movement along the supply curve?

A

A change in the price of the good or service.

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20
Q

What causes a shift in the supply curve?

A

Changes in non-price factors, including:
• Costs of production
• Technology improvements
• Number of sellers

•	Government taxes or subsidies
•	Natural conditions (e.g., weather)
21
Q

What is the difference between an extension and a contraction in supply?

A

• Extension: An increase in quantity supplied due to a price rise
• Contraction: A decrease in quantity supplied due to a price fall

22
Q

What is Price Elasticity of Supply (PES)?

A

A measure of how much the quantity supplied of a good changes in response to a change in price.

23
Q

What is the formula for PES?

A

PES = (% change in quantity supplied) / (% change in price)

24
Q

What does it mean if PES > 1?

A

Elastic supply – quantity supplied is very responsive to price changes

25
What does it mean if PES < 1?
Inelastic supply – quantity supplied is not very responsive to price changes.
26
What are the factors influencing PES?
• Spare production capacity • Stock levels (ability to store goods) • Time period (supply becomes more elastic over time) • Ease of entry into the market
27
What is equilibrium price?
The price at which quantity demanded equals quantity supplied — where the demand and supply curves intersect.
28
What happens if the price is above equilibrium?
There is excess supply (a surplus), causing downward pressure on the price.
29
What happens if the price is below equilibrium?
There is excess demand (a shortage), causing upward pressure on the price.
30
What causes the equilibrium price to change?
Shifts in demand or supply curves — e.g., an increase in demand raises both equilibrium price and quantity.
31
What is the price mechanism?
The system where price signals help allocate resources in markets based on supply and demand.
32
What are the functions of the price mechanism?
Signalling Incentivising Rationing
33
What is the signalling function of price?
Rising or falling prices signal to producers where resources should be allocated.
34
What is the incentive function of price?
Higher prices encourage firms to supply more because they can earn more profit; lower prices discourage production.
35
What is the rationing function of price?
Prices limit demand for scarce goods by making them more expensive, ensuring those who value them most can buy them.
36
What is consumer surplus
The difference between what a consumer is willing to pay for a good (their maximum price) and the market price they actually pay.
37
How is consumer surplus shown on a demand–supply diagram?
As the area below the demand curve and above the market price, up to the quantity traded.
38
What is producer surplus?
The difference between the market price received by producers and the minimum price at which they would have been willing to supply (their marginal cost).
39
How is producer surplus shown on a demand–supply diagram?
As the area above the supply curve and below the market price, up to the quantity traded.
40
What is an indirect tax in economics?
An indirect tax is a tax levied on goods and services rather than on income or profits. It is typically paid by the consumer but collected by the producer or seller, who then passes it on to the government.
41
What are the main types of indirect taxes?
• Specific tax (per unit tax): A fixed amount is charged per unit of the good or service sold (e.g., £1 per pack of cigarettes). • Ad valorem tax (percentage tax): A tax based on a percentage of the price of the good or service (e.g., VAT at 20%).
42
How do indirect taxes affect consumers?
Indirect taxes raise the price of goods and services, which reduces the quantity demanded. Consumers ultimately bear a portion of the tax burden in the form of higher prices.
43
How do indirect taxes affect producers?
Producers may bear part of the tax burden if they absorb some of the tax instead of passing it all on to consumers. This could reduce their profit margins or affect the quantity supplied.
44
What is a subsidy
A subsidy is a payment made by the government to producers or consumers to encourage certain economic activities, reduce prices for consumers, or support industries (e.g., agriculture, renewable energy).
45
What is the key assumption of consumers?
That consumers are rational and aim to maximise utility from their choices.
46
Why might consumers not behave rationally?
• Herd behaviour • Habitual behaviour • Weakness at computation
47
How does herd behaviour affect other peoples behaviour?
Consumers may copy others or conform to social norms, even if it’s not the most rational choice (e.g. fashion, peer pressure).
48
What is habitual behaviour in consumption?
When consumers make decisions automatically, repeating past actions out of habit rather than reevaluating what’s best. (e.g sky wifi)
49
What is meant by consumer weakness at computation?
Many consumers struggle to process complex pricing or calculate best value