How markets work Flashcards
(49 cards)
What is the basic assumption of rational economic decision making?
That consumers aim to maximise utility, and firms aim to maximise profits.
What causes a movement along the demand curve?
A change in the price of the good or service.
What causes a shift of the demand curve?
A change in non-price factors such as:
• Income
• Tastes and preferences
• Price of substitutes and complements
•
• Population size
What is the law of diminishing marginal utility?
As more units of a good are consumed, the additional satisfaction (utility) gained from each extra unit decreases.
How does diminishing marginal utility influence the shape of the demand curve?
It creates a downward-sloping demand curve – as quantity increases, consumers are willing to pay less for additional units.
What is Price Elasticity of Demand (PED)?
A measure of how much quantity demanded changes in response to a change in price.
What is the formula for PED?
PED = % change in quantity demanded
/ % change in price
What does it mean if PED > 1?
Elastic demand – consumers are responsive to price changes.
What does it mean if PED < 1?
Inelastic demand – consumers are not very responsive to price changes.
What are the factors affecting PED?
• Availability of substitutes
• Necessity vs luxury
• Proportion of income spent
• Time period
• Habitual consumption
.Addiction
What is Income Elasticity of Demand (YED)?
A measure of how much demand changes in response to a change in income.
YED = (% change in quantity demanded) / (% change in income)
What does positive YED indicate?
The good is a normal good – demand rises as income rises.
What does negative YED mean?
The good is an inferior good – demand decreases as income rises.
What is Cross Elasticity of Demand (XED)?
A measure of how the quantity demanded of one good responds to a change in the price of another good.
XED = (% change in quantity demanded of Good A) / (% change in price of Good B)
What does a positive XED indicate?
The goods are substitutes – an increase in the price of one increases demand for the other.
What does a negative XED indicate?
The goods are complements – an increase in the price of one decreases demand for the other.
What is supply in economics?
The quantity of a good or service that producers are willing and able to sell at a given price, over a given period of time.
What is the law of supply?
As the price of a good increases, the quantity supplied also increases (ceteris paribus).
What causes a movement along the supply curve?
A change in the price of the good or service.
What causes a shift in the supply curve?
Changes in non-price factors, including:
• Costs of production
• Technology improvements
• Number of sellers
• Government taxes or subsidies • Natural conditions (e.g., weather)
What is the difference between an extension and a contraction in supply?
• Extension: An increase in quantity supplied due to a price rise
• Contraction: A decrease in quantity supplied due to a price fall
What is Price Elasticity of Supply (PES)?
A measure of how much the quantity supplied of a good changes in response to a change in price.
What is the formula for PES?
PES = (% change in quantity supplied) / (% change in price)
What does it mean if PES > 1?
Elastic supply – quantity supplied is very responsive to price changes