Summary and Exam Tips for Demand
Demand is a subtopic of The allocation of resources, which falls under the subject Economics in the Cambridge IGCSE curriculum. Demand refers to the want and willingness of consumers to purchase goods or services at a given price, assuming all other factors remain constant (ceteris paribus). Individual demand pertains to a single consumer, while market demand is the aggregate of all individual demands. Effective demand is when the willingness to buy is supported by the ability to pay, leading to the quantity demanded.
The law of demand states an inverse relationship between price and demand: as price increases, demand decreases, and vice versa. This is visually represented by the demand curve, where movements along the curve indicate changes in quantity demanded due to price changes. Shifts in the demand curve occur due to non-price determinants like branding, market size, demographics, seasonality, income, and expectations. Complements and substitutes also affect demand shifts. Understanding the difference between a change in demand and a change in quantity demanded is crucial, as the former is influenced by non-price factors, while the latter is a result of price changes.
Exam Tips
- Understand Key Concepts: Grasp the definitions of demand, effective demand, and the law of demand. Be able to differentiate between individual and market demand.
- Diagram Skills: Practice drawing and interpreting demand curves. Know how to illustrate movements along the curve versus shifts in the curve.
- Non-Price Determinants: Familiarize yourself with factors like branding, demographics, and seasonality that cause shifts in demand.
- Complementary and Substitute Goods: Be prepared to explain how changes in the prices of these goods affect demand and the demand curve.
- Application of Theory: Use real-world examples to explain concepts, such as how a decrease in the price of a complementary good increases demand for the related product.
