Economic Concepts Flashcards
Economics
The study of how scarce resources are allocated to satisfy unlimited wants.
Microeconomics
The study of decisions related to the allocation of scarce resources by small, individual economic agents, such as households or firms. Buyers in the economy provide the demand for products/services and sellers provide the supply of products/services
Demand/Demand Curve
The amount (quantity) of a product or services that a market will absorb (demand) at a given price, assuming all other factors remain constant. The demand curve is a graph showing the inverse relationship between price and quantity demanded.
Supply/Supply Curve
A graph showing the amount (quantity) of a product or service that will be provided (supplied) at any price, assuming all other factors remain constant. The supply curve is a graph showing the direct relationship between the price and quantity supplied (offered).
Demand Curve Shift/ Reasons
Changes in the quantity demanded of a product/service for reasons other than a change in price. Reasons for an upward (positive) demand curve shift includes:
- The price of substitute goods increases
- expected future price increases
- Income increases so demand for normal goods increases
- The market size increases
Elasticity
A measure of the sensitivity of supply or demand to a change in determinant, such as price, which normally has a direct relationship withe supply and an inverse relationship with demand; or consumer income, which normally has a direct relationship with demand, driving up price and stimulating supply.
Price Elasticity of Demand (Ed)
The ratio of the change in demand compared to a change in the price measured as the change in demand, stated as a percentage, divided by the change in price, also stated as a percentage
(Change in qty demanded/avg qty demanded)/(Change in price/Avg price)
Elastic
When the absolute value of ED is greater then 1, ignoring the fact that is is generally a negative number , indicating an increase in price will result in a decrease in demand that is proportionately higher than the increase in price causing total revenue to decrease. If, for example, a 5% increase in price causes a 10% decrease in demand, total revenues decline.
Inelastic
When the absolute value of ED is less than 1, ignoring the fact that it is generally a negative number, indicating that an increase in price will result in a decrease in demand that is proportionately lower than the increase in price causing total revenue to increase. If, for example, a 10% increase in price causes a 5% decrease in demand, total revenues increase.
Unitary Elasticity
When the absolute value of ED is equal to 1, ignoring the fact that it is generally a negative number, indicating that an increase in price will result in a proportionate decrease in demand causing total revenue to remain unchanged.
Income Elasticity of Demand (EI)
The ratio of the change in demand compared to a change in income measured as the change in demand, stated as a percentage, divided by the change in income, also stated as a percentage
(Change in qty demanded/avg qty demanded)/(Change in income/ avg Income)
EI>0 normal good
EI<0 inferior good
Cross Elasticity of Demand (EXY)
A measurement comparing the change in qty demanded for one product (X) to the change in price of another (Y) to determine if the products are substitutes, indicated by a positive number, or compliments, indicated by a negative number.
Price Elasticity of Supply (ES)
The ratio of the change in supply compared to a change in price measured as the change in supply, stated as a percentage, divided by the change in price, also stated as a percentage
(Change in qty supplied/avg qty supplied)/(Change in price/avg price)
Tells how a change in price will affect the qty supplied.
Opportunity Cost
The value of the best alternative that is not selected when resources can be applied to more than one purpose, such as a job offer that was rejected in order to accept a more desirable alternative.
Equilibrium Price
The point where qty demanded meets qty supplied, meaning everything supplied (offered for sale) is sold (demanded).
Marginal Propensity to Save (MPS)
The portion of the next dollar of available disposable income a consumer will save measured as the Change in Savings/Change in disposable income.
1-MPS=MPC (Marginal propensity to consume/spend).
Price ceiling
a maximum legal price at which a product or service may be sold, usually imposed by governments, and generally results in a shortage (When qty demanded exceeds qty supplied)