मराठी

Determinants of Demand

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Topics

  • Major Determinants of Demand
  • Types of Goods and Income Effect
  • Relation between Income and Demand
  • Relation between Price and Demand for Related Goods
  • Key Point Summary
CISCE: Class 12

Major Determinants of Demand

Determinant What it Means Real-life Example
Price of Commodity Lower price leads to higher demand, and vice versa. People buy more apples when prices fall
Prices of Related Goods Substitutes: Can switch (tea or coffee); Complements: Used together (car & petrol) If petrol price rises, both car and petrol demand fall
Income More income increases demand for many goods (normal goods) A family buys a new TV when income goes up
Tastes & Preferences Changes in fashion, habits, or ads affect what people want Trendy clothes become popular with youth
Population More people = higher demand Growing cities need more food & housing
Wealth Distribution Equal wealth increases overall demand Fairly distributed income leads to mass buying
Government Policy Taxes reduce demand; subsidies can boost demand GST increases on luxury goods lower their demand
Economy’s Condition Booms raise demand; recessions decrease it Demand spikes during festive season sales
Expectations If people expect prices or incomes to change, demand shifts People buy more before a price hike
Credit Facilities Easier loans boost buying of expensive goods More people buy cars due to car loans
Climatic Factors Weather influences what products are needed Demand for fans in summer, woollen clothes in winter
CISCE: Class 12

Types of Goods and Income Effect

Type of Good Income / Related-Price Effect (Concept) Simple Example
Normal goods Demand increases when income increases Mobile phones, branded clothes
Inferior goods Demand decreases when income increases Coarse cereals, black & white TVs
Inexpensive necessities Demand increases slightly with income, then becomes almost constant (plateau) Salt, matchsticks
CISCE: Class 12

Relation between Income and Demand

The functional relationship between the demand for a commodity and the level of income is called income demand. It shows how much quantity a consumer buys at different income levels.

CISCE: Class 12

Relation between Price and Demand for Related Goods

Relation between price and demand for related goods can be understood through substitute goods and complementary goods.

Substitute goods

  • Substitute goods satisfy the same want (for example, tea and coffee).
  • When the price of one substitute rises, its demand falls, and demand for the other substitute rises because consumers shift to the cheaper alternative.
  • In the diagram, when the price of coffee rises from P₀ to P₁, the demand for tea increases from OQ₀ to OQ₁ (movement from A to B on the demand curve of tea).

Complementary goods

  • Complementary goods are used together (for example, car and petrol).
  • When the price of one complement rises, its demand falls, and demand for the other good also falls because both are jointly demanded.
  • In the diagram, when the price of petrol rises from P₀ to P₁, the demand for cars decreases from OQ₀ to OQ₁ (movement from A to B on the demand curve of cars).
Maharashtra State Board: Class 12
CISCE: Class 12

Key Points: Determinants of Demand

  • Demand is affected by many factors, not just price.
  • A change in any determinant—like income, preferences, or population—can shift demand.
  • Some factors (like climate or government taxes) have seasonal or policy-based effects.
  • Related goods can be substitutes (used instead) or complements (used with).
  • Real-life decisions—like bulk buying before a GST rise—are practical examples of demand determinants at work.

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