Changes in Supply and Demand

Glossary

demand:
the relationship between the price and the quantity demanded of a certain good or service

quantity demanded:
the total number of units of a good or service consumers are willing to purchase at a given price

quantity supplied: 
the total number of units of a good or service producers are willing to sell at a given price

shift in demand:
when a change in some economic factor (other than price) causes a different quantity to be demanded at every price

shift in supply: 
when a change in some economic factor (other than price) causes a different quantity to be supplied at every price

supply: 
the relationship between price and the quantity supplied of a certain good or service