Topic
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* Quantity demanded
The amount of a good or service that a consumer is willing and able to purchase at a given price.
* Demand schedule
A table showing the relationship between the price of a product and the quantity of the product demanded.
* 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 everythig else constant, when the price of a product falls, the quantity demanded of the product will increase, and when the price of a product rises, the quantity demanded of the product will decrease.
* Substitution effect
The change in the quantity demanded of a good that results from a change in price making the good more or less expensive relative to other goods that are substitutes.
* Income effect
The change in the quantity demanded of a good that results from the effect of a change in the good's price on consumer purchasing power.
* Ceteris paribus ("all else equal")
The requirement that when analyzing the relationship between two variables - such as price and quantity demanded - other variables must be held constant.
* Substitutes
Goods and services that can be used for the same purpose.
* Complements
Goods that are used together.
* Normal good
A good for which the demand increases as income rises and decreases as income falls.
* Inferior good
A good for which the demand increases as income falls, and decreases as income rises.
* Demographics
The characteristics of a population with respect to age, race, and gender.
* Quantity supplied
The amount of a good or service that a firm is willing and able to supply at a given price.
* Supply schedule
A table that shows the relationship between the price of a product and the quantity of the product supplied.
* Supply curve
A curve that shows the relationship between the price of a product and the quantity of the product supplied.
* Law of supply
Holding everything eelse constant, increases in price cause increases in the quantity supplied, and decreases in price case decreases in the quantity supplied.
* Technological change
A positive or negative change in the ability of a firm to produce a given level of output with a given amount of inputs.
* 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.
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