Theory of Demand and Supply
What is Theory of Demand and Supply?
The quantity of a good or service that consumers are willing and able to purchase at various prices during a given period.
Key points
- Understand the concepts of demand and supply.
- Explain the laws of demand and supply.
- Identify factors that influence demand and supply.
- Determine the equilibrium price and quantity.
Common exam trap
Confusing a change in quantity demanded/supplied (movement along the curve) with a change in demand/supply (shift of the curve).
Definitions
- Term
Demand
- Meaning
The quantity of a good or service that consumers are willing and able to purchase at various prices during a given period.
- Term
Law of Demand
- Meaning
A fundamental principle stating that, all else being equal, as the price of a good or service increases, the quantity demanded will decrease, and vice versa.
- Term
Supply
- Meaning
The quantity of a good or service that producers are willing and able to offer for sale at various prices during a given period.
- Term
Law of Supply
- Meaning
A fundamental principle stating that, all else being equal, as the price of a good or service increases, the quantity supplied will increase, and vice versa.
- Term
Equilibrium Price
- Meaning
The price at which the quantity demanded equals the quantity supplied in a market.
- Term
Equilibrium Quantity
- Meaning
The quantity of a good or service bought and sold at the equilibrium price.
- Term
Ceteris Paribus
- Meaning
A Latin phrase meaning 'all other things being equal' or 'all else held constant'.
Learning objectives
Understand the concepts of demand and supply.
Explain the laws of demand and supply.
Identify factors that influence demand and supply.
Determine the equilibrium price and quantity.
Analyze the impact of shifts in demand and supply on market outcomes.
Prerequisites
Basic understanding of markets and prices.
Familiarity with graphical representation of relationships.
Common mistakes
Confusing a change in quantity demanded/supplied (movement along the curve) with a change in demand/supply (shift of the curve).
Incorrectly identifying substitute and complementary goods.
Assuming ceteris paribus conditions are always met when analyzing real-world scenarios.
Misinterpreting the impact of government policies on supply and demand.
Keywords
Demand
Supply
Equilibrium
Price
Quantity
Market
Law of Demand
Law of Supply
Ceteris Paribus
Demand Curve
Supply Curve
Shortage
Surplus
Practice preview
An increase in the price of a good, ceteris paribus, leads to:…
easy
The supply of a product is determined by:…
easy
Which of the following statements about the price elasticity of demand is INCORRECT?…
hard