Market
Where buyers and sellers come to negotiate the exchange of a good/service.
Demand
The amount of a good/service that consumers are willing and able to buy in a given market at a certain price.
Law of Demand
As the price of the product decreases, the quantity demanded increases ceteris paribus
Non-Price Determinants of Demand
The factors other than price of a product that affect the amount of a product that consumers are willing and able to buy.
Normal Good
A product for which demand increases when income increases.
Inferior Good
A product for which demand decreases when income increases.
Substitutes
Goods that are consumed in place of each other; so as the demand for one increases the others demand decreases.
Complements
Goods that a consumed with each other; so as the demand for one increases so does the demand for the other.
Real Income
What consumers can buy with their income.
Marginal Utility
The satisfaction gained by a consumer from buying 1 additional unit of a good.
Law of Diminishing Marginal Utility
The more of a product consumers buy, the less satisfaction they will get from consuming additional units.
Supply
The amount of a good/service that firms are willing and able to produce in a given market at a given price.
Law of Supply
As price of a product increases, the quantity supplied increases ceteris paribus.
Non-Price Determinants of Supply
Factors other than the price affecting the amount of a good that firms are willing and able to produce.
Competitive Supply
Goods that are produced in place of each other; so increasing the supply of one means decreasing the supply of the other.
Joint Supply
Goods that are produced with each other; so as the supply of one increase so does the other.
Equilibrium
Occurs when there is a state of rest in the market, no incentive to change product’s price, where D=S, quantity Q is bought and sold at price P.
Excess Supply
Occurs when quantity supplied is greater than quantity demanded.
Excess Demand
Occurs when quantity demanded is greater than quantity supplied.
Price Mechanism
Process where firms decide how to allocate resources based on changes in price.