1. Meaning of Demand: Desire vs. Want vs. Demand
In everyday talk, if a college student sees a luxury sports car and says “I want that car,” we call it a wish. In Economics, Demand is much more specific!
- Desire: A mere wish to have something (e.g., wishing to own a private jet with ₹500 in your pocket).
- Want: A desire backed by the ability to pay (having the money), but without the immediate willingness to spend it.
- Demand (Effective Demand): A desire backed by both Ability to Pay (Purchasing Power) AND Willingness to Spend, always expressed with reference to a specific Price and a specific Period of Time!
The 5 Essential Elements of Economic Demand
Element 1
Desire for a Good
Wish to possess the product
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Element 2
Ability to Pay
Having enough money (Purchasing Power)
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Element 3
Willingness to Spend
Ready to part with money
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Elements 4 & 5
Given Price & Time
e.g., "10 kg of apples at ₹100/kg per month"
Definition of Demand
“By demand, we mean the various quantities of a given commodity or service which consumers would buy in one market in a given period of time at various prices, or at various incomes, or at various prices of related goods.” — Bober
Formula of Effective Demand:
Demand = Desire + Ability to Pay + Willingness to Spend (at a Given Price and Given Time)
2. Factors Affecting Demand (Determinants of Demand)
What makes the demand for a product go up or down? In Economics, this relationship is written as the Demand Function:
Dx = f (Px, Pr, Y, T, E, N, W, A)
Let’s understand each of these 8 Factors Affecting Demand with easy Indian examples:
1. Price of the Commodity Itself (Px) — Most Important Factor!
- Other things remaining constant, there is an inverse (opposite) relationship between price and quantity demanded:
- When Price rises (⬆) → Demand falls (⬇)
- When Price falls (⬇) → Demand rises (⬆)
2. Price of Related Goods (Pr)
Related goods are of two types:
- Substitute (Competing) Goods: Goods that can be used in place of each other to satisfy the same want — e.g., Tea and Coffee, Pepsi and Coca-Cola, Ola and Uber.
- Direct Relationship: If the price of Coffee rises, people shift to drinking Tea, so the demand for Tea increases!
- Complementary (Joint) Goods: Goods that are used together to satisfy a single want — e.g., Car and Petrol, Printer and Ink Cartridge, Bread and Butter, Mobile Phone and SIM Card.
- Inverse Relationship: If the price of Petrol shoots up, people buy fewer petrol cars, so the demand for Cars falls!
3. Income of the Consumer (Y)
How a change in consumer income affects demand depends on the nature of the good:
- Normal Goods (Clothes, milk, smartphones, AC): As consumer Income rises (⬆), Demand rises (⬆).
- Inferior / Cheap Goods (Coarse grain like Jowar/Bajra, local unbranded shoes, kerosene): As a person becomes richer (Income rises ⬆), they stop buying cheap inferior goods and shift to superior goods (Basmati rice, Nike shoes, LPG), so Demand for inferior goods falls (⬇)!
- Inexpensive Necessities (Salt, matchboxes, medicines): Demand remains constant after a certain limit even if your income doubles! (Even a billionaire doesn’t eat 5 kg of salt a day!).
4. Tastes, Preferences, Habits, and Fashion (T)
- When a product comes into fashion or trend (e.g., Oversized T-shirts, Korean noodles, smartwatches), its demand rises even at high prices. When it goes out of fashion (e.g., keypad phones, bell-bottom pants), its demand falls.
5. Future Expectations About Price and Income (E)
- If consumers expect the price of gold or petrol to rise tomorrow, they rush to buy more today even at current high prices! Conversely, if they expect a big Diwali 50% discount next week, they postpone buying today.
6. Size and Composition of Population (N)
- A larger population creates higher market demand for food, housing, and clothes.
- Demographic Composition: If a country has more babies, demand for diapers and baby milk rises; if it has more college youth (like India), demand for smartphones, bikes, and cafes rises.
7. Weather, Climate, and Season (W)
- Demand for ACs, coolers, cold drinks, and cotton T-shirts surges in Summer (April–June), whereas demand for umbrellas/raincoats peaks in Monsoon and woollen jackets/heaters peaks in Winter.
8. Advertising and Sales Promotion (A)
- Persuasive TV, Instagram, and celebrity advertisements create brand awareness and shift consumer preferences, increasing market demand.
3. Types of Demand
In Business Economics, demand is classified into 8 major types:
| # | Type of Demand | Simple Meaning | Everyday Indian Example |
|---|---|---|---|
| 1 | Price Demand | Quantity of a good a consumer buys at different prices of that good (assuming income & tastes remain constant). | Buying 2 kg mangoes at ₹100/kg, or 5 kg mangoes when price drops to ₹50/kg. |
| 2 | Income Demand | Quantity of a good a consumer buys at different levels of their income. | Upgrading from a ₹10,000 phone to an iPhone when monthly salary rises from ₹25,000 to ₹1,00,000. |
| 3 | Cross Demand | How demand for Good X changes due to a change in the price of Related Good Y (Substitute or Complementary). | Demand for Amul Butter changing when the price of Britannia Bread changes. |
| 4 | Individual vs. Market Demand | Individual Demand = demand of 1 buyer; Market Demand = total sum of demands of all buyers in the market. | Rahul buys 1 litre of milk/day (Individual); all 5 Lakh families in Indore buy 10 Lakh litres/day (Market). |
| 5 | Direct (Autonomous) vs. Derived Demand | Direct Demand: Goods demanded directly for final consumption. Derived Demand: Goods demanded because they are needed to make another product! |
• Direct: Buying a Readymade Shirt or House. • Derived: Demand for Cotton Yarn, Sewing Machines, Cement, and Bricks (derived from demand for shirts and houses!). |
| 6 | Joint (Complementary) Demand | When two or more goods are demanded together at the same time to satisfy a single want. | Tea Leaves + Milk + Sugar (to make a cup of tea); Car + Tyres + Petrol. |
| 7 | Composite Demand | When a single commodity is demanded because it can be put to several alternative uses. | Electricity (used for lighting, AC, cooking, charging EVs, running factories); Milk (curd, paneer, ghee, sweets, tea). |
| 8 | Short-Run vs. Long-Run Demand | Short-Run: Immediate reaction to a price change with existing equipment. Long-Run: Demand after consumers have time to adjust their habits and appliances. |
If petrol price doubles today, car owners still buy petrol today (Short-run), but over 2 years they switch to Electric Scooters/Cars (Long-run). |
4. Classroom Activities 1 & 2 (Product & Advertisement Demand Analysis)
(As prescribed in the DAVV BBA Syllabus — Unit 4, Activity 1 & Activity 2)
Activity 1: Local Product Demand Analysis (Cold Drinks, T-Shirts, Mobile Phones)
| Chosen Product | Factors Increasing/Decreasing Its Demand | Type of Demand It Represents |
|---|---|---|
| 1. Cold Drinks (Thums Up / Coca-Cola) | • Weather: 42°C summer heat increases demand 3x; winter drops it. • Price of Substitutes: If fresh Sugarcane Juice or Lassi is cheap (₹20), cold drink demand dips. • Festivals & Parties: Diwali/IPL matches boost party pack sales. |
• Direct Demand (consumed directly) • Substitute Relationship (Pepsi vs. Coke) • Complementary with fast food (Pizza/Burger + Coke). |
| 2. Cotton T-Shirts | • Fashion & Youth Trends: Oversized/printed anime T-shirts increase youth demand. • Income & Discounts: Myntra/Zudio ₹299 sales boost volume. • Season: High in summer, lower in peak winter. |
• Direct & Normal Good Demand (rises with income) • Substitute: Formal shirts / kurtas. |
| 3. Smartphones | • Income & EMI Facility: Zero-cost EMI increases demand. • Technology / Features: 5G & AI camera upgrades trigger replacement demand. • Complementary Prices: Cheap 5G data plans (Jio/Airtel) boost smartphone demand! |
• Joint/Complementary Demand (Phone + SIM Card + Charger + Internet Data) • Durable Good Demand. |
Activity 2: Advertisement Analysis — How an Ad Affects Demand
- Selected Advertisement: Cadbury Dairy Milk — “Kuch Meetha Ho Jaaye” TV & Social Media Campaign.
- How the Ad Affects Demand:
- Shifts Taste & Preference (T): Positions chocolate not just as a kid’s candy, but as a substitute for traditional Indian sweets (Mithai) after dinner and during festivals (Diwali/Rakhi).
- Price Point Strategy (Px): Highlights ₹10, ₹20, ₹50, and ₹150 Celebrations gift packs to suit every income group (Income Demand).
- Type of Demand: Converts a luxury impulse snack into a Festive Necessary / Substitute Good (substituting Kaju Katli / Gulab Jamun during festivals).
💡 DAVV Exam Tip
Question (10 Marks): “Define Demand. Explain the various factors affecting demand (determinants of demand) and the different types of demand.”
- Write the 5-Element Equation:
Demand = Desire + Ability to Pay + Willingness to Spend + Given Price + Given Time.- Write the Demand Function:
Dx = f (Px, Pr, Y, T, E, N, W, A)and explain all 8 determinants.- Clearly distinguish Direct vs. Derived Demand and Joint vs. Composite Demand with examples!