Non-Price Factors Affecting Demand

Introduction

The demand curve illustrates the relationship between price and quantity demanded, assuming all other factors remain constant (ceteris paribus). Changes in these non-price factors cause the entire demand curve to shift, indicating a change in demand. A rightward shift represents an increase in demand (greater quantity demanded at each price), while a leftward shift represents a decrease in demand (lower quantity demanded at each price).

Key Non-Price Factors

1. Disposable Income

• Definition: The income households have available to spend or save after taxes and government transfers.
• Impact:
  • Increase in disposable income: Generally leads to an increase in demand for most goods and services (normal goods).
  • Decrease in disposable income: Generally leads to a decrease in demand for most goods and services (normal goods).
  • Inferior Goods: Demand increases when disposable income decreases (e.g., generic brands).
• Examples:
  • Pay raise increases demand for restaurant meals.
  • Tax cut increases demand for new cars.
  • Loss of job increases demand for cheaper food options.

KEY TAKEAWAY: Disposable income directly impacts consumers’ ability and willingness to purchase goods and services.

2. Prices of Substitutes and Complements

• Substitutes: Goods that can be used in place of each other.
  • Example: Tea and coffee.
  • Impact: An increase in the price of one good leads to an increase in the demand for its substitute. A decrease in the price of one good leads to a decrease in the demand for its substitute.
• Complements: Goods that are used together.
  • Example: Cars and petrol.
  • Impact: An increase in the price of one good leads to a decrease in the demand for its complement. A decrease in the price of one good leads to an increase in the demand for its complement.

EXAM TIP: Clearly identify whether goods are substitutes or complements in your answers.

3. Preferences and Tastes

• Definition: Consumer attitudes, feelings, and beliefs about a product.
• Impact:
  • Favorable change in preferences: Leads to an increase in demand.
  • Unfavorable change in preferences: Leads to a decrease in demand.
• Influences: Advertising, trends, health concerns, ethical considerations.
• Examples:
  • Increased awareness of health benefits leads to higher demand for organic food.
  • A new fashion trend increases demand for specific clothing items.
  • Negative publicity reduces demand for cigarettes.

STUDY HINT: Consider how marketing and social trends can influence consumer preferences.

4. Interest Rates

• Definition: The cost of borrowing money.
• Impact:
  • Increase in interest rates: Reduces demand for goods and services often purchased with credit (e.g., houses, cars, appliances).
  • Decrease in interest rates: Increases demand for goods and services often purchased with credit.
• Examples:
  • Lower interest rates on mortgages increase demand for housing.
  • Higher interest rates on car loans decrease demand for new cars.

COMMON MISTAKE: Confusing the impact of interest rates on savings versus borrowing. Focus on the borrowing aspect for demand.

5. Population Demographics

• Definition: The characteristics of a population, such as size, age distribution, gender ratio, and cultural background.
• Impact: Changes in demographics can shift the demand for specific goods and services.
• Examples:
  • An aging population increases demand for healthcare services and retirement homes.
  • A growing population increases demand for housing and education.
  • Increased immigration can alter demand patterns based on cultural preferences.

VCAA FOCUS: Be prepared to analyze how specific demographic changes affect particular markets.

6. Consumer Confidence

• Definition: A measure of consumers’ optimism or pessimism about the economy and their own financial situation.
• Impact:
  • High consumer confidence: Leads to increased spending and higher demand for goods and services.
  • Low consumer confidence: Leads to decreased spending and lower demand for goods and services.
• Influences: News about the economy, job security, income expectations.
• Examples:
  • Positive economic news boosts consumer confidence and increases demand for luxury goods.
  • Fear of recession lowers consumer confidence and decreases demand for non-essential items.

REMEMBER: Higher confidence = Higher spending = Higher demand.

Summary Table