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Elasticity in Marketing

The Sensitivity of Demand

Why Elasticity Matters

Elasticity in marketing measures how sensitive the quantity demanded of a product is to changes in variables like price, income, or promotional activities. It tells businesses how much consumer demand will change in response to certain changes, guiding pricing and marketing strategies.

Key Elasticity Measures

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Price Elasticity (PED)

Responsiveness of demand to price change. If PED > 1, demand is elastic.
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Income Elasticity (YED)

How demand changes as consumer income changes. YED > 0 means a normal good.
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Promotional Elasticity

Demand change in response to promotional activities (advertising or discounts).

The Elasticity Formula

PED = (% change in quantity demanded) / (% change in price)
The fundamental measure of price sensitivity. Percentage change calculations use the formula: (New value - Old value) / Old value.

Example Calculation (PED)

If price falls from $10 to $8 (20% decrease) and demand rises from 100 to 140 units (40% increase):

Metric Change (%) Calculation Result
Price Change (Variable) -20%
Quantity Change (Demand) 40%
Elasticity (PED) -2.0
Interpretation: The magnitude 2 means demand is elastic.

Demand Interpretation

✅
Elastic Demand (PED > 1)Small price changes cause large changes in demand. Businesses may reduce price to increase total revenue.
❌
Inelastic Demand (PED < 1)Price changes have little effect on demand. Firms can raise prices to increase total revenue without losing many sales.

Impact on Business Decisions

Understanding elasticity is crucial for strategic planning across different business functions.

1

Pricing

Knowing PED guides pricing strategies. For elastic products, reducing price can increase total revenue.
2

Product Development

Products identified as income elastic normal goods may deserve more investment during growth phases.
3

Marketing Expenditure

A high promotional elasticity supports greater marketing budgets since promotions yield significant sales increases.
4

Risk Management

Understanding elasticity guides firms in managing risks associated with economic downturns or intense competition.

Limitations and Cautions

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Use with Caution: Elasticity values are estimates based on historical data and assume ceteris paribus (all other factors constant), which is rarely the case in a dynamic market.

Elasticity can vary along the demand curve; hence, a single value is an average figure. Misinterpretation can lead to poor strategic decisions.

Elasticity of Demand Deck
Term
Price Elasticity of Demand (PED)

What does Price Elasticity of Demand (PED) measure?

Answer
Definition

The responsiveness of quantity demanded to a change in the product’s price.

Term
PED Calculation

How is PED calculated?

Answer
Formula

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

Term
Interpretation of PED > 1

What does it mean if PED > 1?

Answer
Meaning

Demand is elastic; quantity demanded is highly sensitive to price changes.

Term
Income Elasticity of Demand (YED)

What is Income Elasticity of Demand (YED)?

Answer
Definition

It measures how demand changes as consumer income changes.

Term
Positive YED

What does a positive YED indicate?

Answer
Meaning

The product is a normal good (demand increases with income).

Term
Promotional Elasticity

What does promotional elasticity of demand measure?

Answer
Definition

The change in demand in response to promotional activities like advertising or discounts.

Term
Use of Elasticity Info

How can businesses use elasticity information?

Answer
Uses

To guide pricing, marketing, production, and risk management decisions.

Term
Inelastic Demand (PED < 1)

What happens if demand is inelastic (PED < 1)?

Answer
Effect

Price changes have little effect on demand, so firms can raise prices to increase revenue.

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Limitations of Elasticity

What are limitations of using elasticity?

Answer
Limitations

Elasticity estimates can change, assume all else constant, and may be hard to isolate for complex factors.

Term
Negative Sign in PED

What does a negative sign in PED indicate?

Answer
Meaning

An inverse relationship between price and demand (price decreases, demand increases).

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🌸 Elasticity in Marketing Quiz

1. What does a Price Elasticity of Demand (PED) value of -2 indicate?

PED magnitude greater than 1 means elastic demand, and the negative sign shows price and demand move inversely.

2. If the Income Elasticity of Demand (YED) for a product is -0.5, the product is:

Negative YED means demand decreases as income rises, indicating an inferior good.

3. True or False: When demand is price inelastic, increasing prices typically reduces total revenue.

Inelastic demand means consumers are less sensitive to price changes, so raising prices usually increases total revenue.

4. Promotional elasticity helps measure:

It shows the responsiveness of demand to promotions like advertising or discounts.

5. Fill in the blank: The formula to calculate percentage change is ________.

The formula is (New value – Old value) / Old value × 100 to calculate percentage change.

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