Clever Grades

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Market Dynamics and Elasticity

1. Factors Changing Demand (1.2.1)

These are the non-price factors that cause the entire demand curve to shift left or right.

1

Substitutes and Complements

If the price of substitutes falls, demand for the original product may decrease (e.g., cheaper bus fares reducing demand for train tickets).
2

Consumer Incomes

Higher incomes typically increase demand for normal goods and decrease demand for inferior goods.
3

Fashions, Tastes, and Preferences

Demand changes with trends, lifestyle changes, and tastes. A rise in environmental awareness might increase demand for electric cars.
4

Advertising and Branding

Effective advertising can stimulate demand by raising awareness and creating emotional connections with products.
5

Demographics & Shocks

Population size, structure, external shocks (natural disasters, pandemics), and seasonality all influence demand.

2. Factors Changing Supply (1.2.2)

A

Costs of Production

If production costs fall (e.g., cheaper raw materials), supply increases as producers can sell more profitably. If costs rise, supply may decrease.
B

New Technology

Technological advances improve efficiency and increase supply by lowering costs or increasing output.
C

Indirect Taxes & Subsidies

Taxes increase production costs, reducing supply. Subsidies reduce costs, encouraging higher supply.
D

External Shocks

Natural disasters or supply chain disruptions can reduce supply temporarily or permanently.

3. Market Interaction (1.2.3)

Equilibrium Definition

Supply and demand interact to determine market prices and output levels. The equilibrium point is where quantity supplied equals quantity demanded.

Diagram Interpretation

A rightward shift in demand increases price and quantity, while a leftward shift reduces them. A rightward shift in supply lowers prices and increases quantity; a leftward shift raises prices and reduces quantity.

4. PED Calculation (1.2.4 a)

PED = % change in quantity demanded ÷ % change in price
Measures the responsiveness of quantity demanded to a change in price.

PED Interpretation & Revenue

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Elastic Demand (PED > 1) Quantity changes proportionally more than price. Price cuts increase total revenue.
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Inelastic Demand (PED < 1) Quantity changes less than price. Price increases raise total revenue.

Factors Influencing PED (1.2.4 c)

These four factors determine whether demand is elastic or inelastic.

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Substitutes

More availability means demand is more elastic.
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Time Period

Demand tends to become more elastic over time.
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Necessity

Necessities have inelastic demand; luxuries are elastic.
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Income Share

A larger proportion of income spent makes demand more elastic.

5. YED Calculation (1.2.5 a)

YED = % change in quantity demanded ÷ % change in income
Predicts how demand changes with economic growth or recession.

YED Interpretation (Good Types)

The sign and magnitude of YED categorize the type of product.

+ > 1

Luxury Goods

Positive YED > 1. Demand rises faster than income.
+ < 1

Normal Goods

Positive YED < 1. Demand rises slower than income.
-

Inferior Goods

Negative YED. Demand decreases as income rises.

YED Significance for Businesses

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Strategic Planning: Understanding YED allows businesses to predict how demand will change with economic conditions. This aids in planning product portfolios and stock levels during growth or recession.

Demand, Supply, Markets & Elasticities Deck
Q
Demand and Substitute Goods

What happens to demand if the price of a substitute good falls?

A
Answer

Demand for the original product decreases.

Q
Income Effects on Demand

How does an increase in consumer income affect demand for normal goods?

A
Answer

Demand for normal goods increases.

Q
Complementary Goods and Demand

What is the effect of rising prices of complementary goods on demand?

A
Answer

Demand for the related product falls.

Q
Seasonal Factors

Name a factor that can cause seasonal fluctuations in demand.

A
Answer

Seasonal changes or time of year (e.g., winter coats demand rises in winter).

Q
External Shocks and Supply

How do external shocks affect supply?

A
Answer

They typically reduce supply temporarily or permanently.

Q
Price Elasticity of Demand

What is the formula for Price Elasticity of Demand (PED)?

A
Answer

PED = % change in quantity demanded ÷ % change in price.

Q
Interpretation of PED

What does it mean if PED > 1?

A
Answer

Demand is elastic.

Q
Total Revenue and Inelastic Demand

What happens to total revenue when prices increase and demand is inelastic?

A
Answer

Total revenue increases.

Q
Government Subsidies and Supply

How do government subsidies affect supply?

A
Answer

Subsidies reduce production costs, increasing supply.

Q
Supply Curve Shift

What does a rightward shift in the supply curve indicate?

A
Answer

Increase in supply, leading to lower prices and higher quantity.

Q
Income Elasticity of Demand (YED)

Define Income Elasticity of Demand (YED).

A
Answer

YED = % change in quantity demanded ÷ % change in income.

Q
Inferior Goods and YED

What type of good has a negative YED?

A
Answer

Inferior goods.

Q
Advertising and Demand

How do advertising and branding affect demand?

A
Answer

They stimulate demand by raising awareness and building loyalty.

Q
Market Equilibrium

What is the equilibrium point in a market?

A
Answer

The price and quantity where supply equals demand.

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📈 Economics Quiz: Demand & Supply

1. If the price of coffee (a substitute for tea) falls, what is likely to happen to the demand for tea?

When the price of a substitute falls, consumers switch to the cheaper alternative, lowering demand for the original product.

2. Which of the following factors would NOT increase demand?

Higher prices of complements reduce demand for the product used alongside them.

3. What does a PED of 0.7 imply?

PED less than 1 means quantity demanded changes proportionally less than price.

4. A government subsidy will likely:

Subsidies reduce costs for producers, encouraging more output.

5. If a product has a positive YED greater than 1, it is classified as:

A YED >1 indicates demand rises faster than income, typical of luxury goods.

📊 Results

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