Meaning of Demand: Desire, Want & Demand
Class 11 Micro Economics — Understanding the economic definition of demand and how a mere desire transforms into economic demand
Desire → Want → Demand
Every day you want hundreds of things — a car, the latest iPhone, designer shoes. But in economics, not every “want” qualifies as “demand”. There is a clear progression — a transformation — from desire to want to demand.
Definition of Demand
Demand is the quantity of a commodity that a consumer is willing and able to buy, at each possible price during a given period of time.
Four Essential Elements of Demand
Quantity
of the commodity
Willingness
to buy it
Price
of the commodity
Time Period
specific time frame
Individual Demand vs Market Demand
Demand can be looked at from two perspectives: one consumer's demand or every consumer's demand combined. Understanding this distinction is fundamental to economic analysis.
Individual Demand
Quantity of a commodity that a consumer is willing and able to buy, at each possible price during a given period of time.
Example
Rahul is willing to buy 3 kg of apples at ₹200/kg in a week. That's Rahul's individual demand for apples.
Market Demand
Quantity of a commodity that all consumers are willing and able to buy, at each possible price during a given period of time.
Example
If 1,000 people in a city are willing to buy apples at ₹200/kg, the total market demand is 3,000 kg per week.
Flow Variable
Demand is a Flow Variable— it is always expressed with reference to a time frame. For example: “Demand for apples is 100 units per week” or “Demand for petrol is 500 liters per day.” Without a time dimension, demand has no meaning in economics.
Key Takeaways
- Desire is a mere wish — no ability to acquire. A poor person desiring a car has only desire, not demand.
- Want is desire backed by ability and willingness to satisfy it. Winning a lottery turns a desire into a want.
- Demand = Quantity + Willingness + Ability + Price + Time Period — all five must be present.
- Individual demand refers to a single consumer; market demand is the sum of all individual demands.
- Demand is a flow variable — it is always expressed per unit of time (per day, per week, per month, per year).