Chapter 3 - Where prices come from: the interaction of demand and supply Flashcards
Consumer Sovereignty
In a market system, consumers ultimately determine which goods and services will be produced.
When discussing demand
we are considering, not what a consumer wants to buy, but what the consumer is both WILLING AND ABLE to buy.
Demand schedules
A table showing the relationship between the price of a product and the quantity of product demanded.
Quantity demanded
The amount of good or service that a consumer is willing and able to purchase at a given price.
Demand curve
A curve that shows the relationship between the price of a product and the quantity of the product demanded.
Market demand
The demand by all the consumers of a given good or service.
Law of demand
Holding everything else constant, when the price of a product falls, the quantity demanded will increase. And when the price of a product rises, the quantity demanded will decrease.
Ceteris Paribus (all else being equal)
The requirement that when analysing the relationship between two variables, such as price and quantity demanded - other variables must be held constant.
Substitution effect
The change in the quantity demanded of a good or service that results from a change in price, making the good or service more or less expensive relative to other goods or services that are substitutes.
Income effect
The change in the quantity demanded of a good or service that results from the effect of a change in price on consumer purchasing power.
The substitution & income effect
happen simultaneously when a price changes.
A shift in a demand curve
is an increase or decrease in demand.
A movement along a demand curve
is an increase or decrease in the quantity demanded.
Variables that influence market demand
- Income
- Prices of related goods.
- Tastes
- Population
- Expected future prices
Normal good
A good or service for which the demand increases as income rises and decreases as income falls. I.e. Kombucha
Inferior good
A good or service for which the demand increases as income falls and decreases as income rises. I.e. Ice clothing
Law of supply
Holding everything else constant, an increase in the price of a product causes and increase in the quantity supplied, and the decrease of the price of a product causes a decrease in the quantity supplied.
The most important variables that shift market supply
Prices of inputs Technological changes Prices of substitutes in production Number of firms in the market Expected future prices
Technological change
A change in the ability of a firm to produce output with a given quantity of inputs.
Productivity
The output produced per unit of input.
Market equilibrium
A situation in which quantity demanded equals quantity supplied.
Competitive market equilibrium
A market equilibrium with many buyers and many sellers.
Surplus
A situation in which the quantity supplied is greater than the quantity demanded.
Shortage
A situation in which the quantity demanded is greater than the quantity supplied.