BEC Deck 2-Economic Concepts Flashcards
Many economic concepts & relationships are depicted using graphs. These graphs often show the relationship between two variables:
An independent variable (usually shown on the horizontal “X” axis), an dependent variable (usually shown on the vertical “Y” axis).
Ceteris Paribus:
Any influence that other variables (other than the one in the graph) may have on the dependent variable is assumed to be held constant.
U=y + q(x)
U=unknown value of the variable Y being determined and/or plotted
Y=the value of the plotted line where it crosses the Y-axis; called the “intercept”. This is commonly the value of Y where X=0
Q=the value by which the value of Y changes as each unit of the X variable changes
X=the value of the variable X
Y=mx+B
Y=unknown value of Y
m=slope of the plotted line
x=the value of the variable X
b=the Y-intercept
Command Economic System-
A system in which the government largely determines the production, distribution and consumption of goods and services. Communism & socialism are prime examples.
Market (free-enterprise) economic system-
A system in which individuals, businesses & other distinct entities determine production, distribution & consumption in an open (free) market. Capitalism is the prime example.
A price ceiling is a government-mandated maximum price that can be charged for a good or service. Rent controls, for example, establish the maximum price that can be charged for rent.
Price ceilings result in a lower price than would otherwise occur in a free market and cause the quantity of a commodity supplied to be less than would be demanded at a free market price. Thus, a shortage exists as the difference between quantity supplied at the price ceiling and the greater quantity demanded at that price.
A price floor is a government-mandated minimum price for a good or service. The minimum wage law, for example, establishes the minimum wage that can be paid to employees.
Price floors result in a higher price than would otherwise occur in a free market and cause the quantity of a commodity supplied to be greater than would be demanded at a free market price.
Thus, a surplus exists as the difference between quantity supplied at the price floor and the lesser quantity demanded at that price.
Elasticity-
Measures the % change in a market factor (e.g. demand) seen as a result of a given % change in another market factor (e.g. price)
Elasticity of Demand-measures the % change in quantity of a commodity demanded as a result of a given % change in the price of the commodity.
Formulas:
ED=% change in quantity demanded/ % change in price
Expanded Formula:
ED=(change in quantity demanded/prechange quantity demanded)/(change in price/prechange price)
Perfect competition exists in industries or markets characterized by:
1)A large # of independent buyers & sellers, each of which is too small to separately affect the price of a commodity
2)All firms sell homogeneous products or services.
3)Firms can enter or leave the market easily.
4)Resources are completely mobile.
5)Buyers & sellers have perfect information.
6)Government does not set prices.
A market meeting all of these criteria is virtually impossible to identify.
Perfect monopoly exists in industries or markets characterized by:
1) A single seller.
2) A commodity for which there are no close substitutes.
3) Restricted entry into the market.
A monopoly may as a result of:
1) Control of raw material inputs or processes. (patent)
2) Government action (govnt granted franchise)
3) Increasing return to scale (public utilities)
Monopolistic competition exists in industries or markets characterized by:
1)A large number of sellers.
2)Firms sell a differentiated product or service (similar but not perceived as identical), for which there are close substitutes.
3)Firms can easily enter or leave the market.
Thus it has elements of both perfect competition & perfect monopoly.
Oligopoly exists in industries or markets characterized by:
1) A few sellers
2) Firms sell either a homogeneous product (standard oligopoly) or a differentiated product (differentiated oligopoly).
3) Restricted entry into the market.