4.1.3.1- Demand Flashcards
Define demand
The quantity of a good or service hat consumers are willing and able to buy at any possible price in a given period
What is the law of demand
Ceteris paribus, there is an inverse relationship between the quantity demanded and the price of a good or service
3 reasons why the demand curve have a downwards slope
- the law of diminishing marginal utility
- the income effect
- the substitution effect
What is the law of diminishing marginal utility
The more of a product we consume, the less utility each additional unit consumed provides
What is the income effect
If our income is fixed, and the price of a product falls, we can afford more of it. Equally if the price of a product increases, we cannot afford as much therefore demand decreases
What is the substitution effect
For goods with substitutes, if price falls the consumers will switch to buying the now relatively cheaper products and vice versa.
What is an extension of demand
When there is a movement along the demand curve that results in an increase in the quantity demanded
What is a contraction of demand
Movement along the demand curve that results in a decrease in the quantity demanded
What 7 factors cause a shift in the demand curve
- population
- income
- related goods
- advertising
- trends
- expectations
- seasons
How does population cause a shift in the demand curve
Larger populations demand more, so demand curve shifts out. The age distribution of the population also affects the patterns of demand
How does income cause demand shifts
Consumers with a high disposable income will be able to afford more goods, therefore demand increases cause it a shift out.
Hoes does related goods cause a shift in demand
Substitute goods replace a product, if the price of a substitute good falls, demand for the original good will also fall because it will be more expensive. A complimentary good compliments other goods, if the complimentary goods price falls, its demand increases, so the original good will increase.
How does advertising cause a shift in demand
By increasing advertisement, the demand for products will also increase, causing as shift out.
How do trends cause a shift in demand
If something is in/out of fashion, the demand will increase/decrease based on how people preferences change
How do expectations cause shifts in demand curves
If speculators expect the price to increase in the future, they may buy more of the certain good, increasing the quantity demanded