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ECO 110 (ch. 4, 5, & 6)
Microeconomics - Mankiw
63
Economics
Undergraduate 1
02/15/2011

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Term
market
Definition
group of buyers & sellers of a particular good/service
Term
competitive market
Definition
a market in which there are many buyers & sellers so that each as a negligible impact on the market price
Term
perfectly competitive
Definition
1. the goods offered are all the same
2. the buyers & sellers are so numerous that no single buyer/seller has any influence over the market price
Term
quantity demanded
Definition
the amt. of a good that buyers are willing and able to purchase
Term
law of demand
Definition
the claim that, other things equal, the quantity demanded of a good falls when the price of the good rises
Term
demand schedule
Definition
a table that shows the realtionship btwn the price of a good & the quantity demanded
Term
market demand
Definition
the sum of all the individual demands for a particular good/service
Term
normal good
Definition
demand for a good falls when income falls
Term
inferior good
Definition
demand for a good rises when income falls
Term
substitutes
Definition
increase in price in one leads to an increase in demand for the other
Term
complements
Definition
increase in price of one leads to a decrease in demand for the other
Term
Variables that cause a shift in demand curve (INFLUENCE BUYERS):
Definition
price of the good itself
income
prices of related goods
tastes
expectations
number of buyers
Term
Shift vs. Movement along demand curve:
Definition
if demand curve SHIFTS, the entire demand curve (line) moves

if demand curve MOVES, the point on the demand curves moves along the same demand curve and the line does not move, only the point does
Term
quantity supplied
Definition
the amt. of a good that sellers are willing and able to sell
Term
law of supply
Definition
the quantity supplied of a good rises when the price of the good rises
Term
supply schedule
Definition
chart showing the relationship btwn. the price of a good and the quantity supplied
Term
supply curve
Definition
a graph of the relationship btwn. the price of a good and the quantity supplied
Term
Variables that shift the supply curve (INFLUENCE SELLERS):
Definition
price of the good itself
input prices
technology
expectations
number of sellers
Term
equilibrium
Definition
when marker price reaches a level at which quantity supplied = quantity demanded
Term
equilibrium price
Definition
the price that balances quantity supplied & quantity demanded
Term
equilibrium quantity
Definition
the quantity supplied and the quantity demanded at the equilibrium price
Term
surplus
Definition
a situation in which quantity supplied is greater than quantity demanded
Term
shortage
Definition
situation in which quantity demanded is greater than quantity supplied (excess demand)
Term
law of supply & demand
Definition
the price of any good adjusts to bring the quantity supplied and the quantity demanded for that good into balance
Term
three steps for analyzing changes in equilibrium:
Definition
1. decide if event shifts supply/demand/both
2. decide in which direction the curve shifts
3. use the supply-and-demand diagram to see how the shift changes the equilibrium price & quantity
Term
______ refers to the position of the supply curve, whereas _________ refers to the amount suppliers wish to sell
Definition
supply
quantity supplied
Term
a shift in the supply curve =
Definition
"change in supply"
Term
a shift in the demand curve =
Definition
"change in demand"
Term
a movement along a fixed supply curve =
Definition
"change in quantity supplied"
Term
a movement along a fixed demand curve =
Definition
"change in the quantity demanded"
Term
elasticity
Definition
a measure of the responsiveness of quantity demanded or quantity supplied to one of its determinants
Term
price elasticity of demand
Definition
measures how much the quantity demanded responds to a change in price

%changeQd/%changeP
Term
demand for a good is said to be elastic when...
Definition
the quantity demanded responds substantially to a change in price
Term
demand is said to be inelastic if...
Definition
the quantity demanded responds only slightly to changes in price
Term
determinants of price elasticity of demand
Definition
availability of close substitutes
necessity vs. luxury
definition of the market
time horizon
Term
midpoint method
(better way to calculate % changes and elasticities)
Definition
divide the change by the average of the initial & final levels
Term
demand = elastic if elasticity is (>,=,<) 1
Definition
greater than 1
Term
demand = inelastic if elasticity is (<,=,>) 1
Definition
less than 1
Term
if elasticity is exactly 1, demand is said to have...
Definition
unit elasticity
Term
perfectly inelastic
Definition
elasticity = 0
demand curve is vertical
regardless of price, qty. demanded stays the same
Term
perfectly elastic
Definition
demand curve is horizontal
small price changes cause huge changes in quantity demanded
Term
inelastic curves look like...
Definition
the letter I
Term
total revenue
Definition
the amount paid by the buyer & received by the sellers of a good, computed as the price of the good times the quantity sold
Term
income elasticity of demand
Definition
a measure of how much the quantity demanded of a good responds to a change in consumers' income, computed as %changeQd/%changeIncome
Term
inferior goods have _________ income elasticities
Definition
negative
Term
cross-price elasticity of demand
Definition
measures how the quantity demanded of one goood responds to a change in price of another good

%changeQd1/%changeP2
Term
price elasticity of supply
Definition
measures how much the quantity supplied responds to changes in the price

%changeQs/%changeP
Term
supply of a good is said to be _________ if the quantity supplied responds substantially to changes in price
Definition
elastic
Term
supply is said to be _________ if the quantity supplied responds only slightly to changes in price
Definition
inelastic
Term
price ceiling
Definition
legal maximum on the price at which a good can be sold
Term
price floor
Definition
legal minimum on the price at which a good can be sold
Term
if the price is below a price ceiling it is ___________
Definition
not binding
Term
if the equilibrium price is above the price ceiling it is said to be _____________
Definition
a binding constraint
Term
binding price ceilings cause
Definition
shortage of goods

sellers must ration the scarce goods among the large # of potential buyers
Term
free markets ration goods with ___________
Definition
prices
Term
a common example of a price ceiling is ___________
Definition
rent control
Term
short-term effects of price ceilings are realatively ____________, while long term effects are ____________
Definition
short term effects = inelastic
long term effects = elastic
Term
binding price floors cause ________
Definition
surplus

minimum wage example
Term
tax incidence
Definition
the manner in which the burden of a tax is shared among participants in a market
Term
taxes _________ market activity
Definition
discourage
Term
when a good is taxed, the quantity of the good sold is _________ in the new equilibrium
Definition
smaller
Term
when a good is taxed, the new equilibrium causes buyers to pay ______ & sellers to receive _________
Definition
buyers pay more
sellers receive less
Term
a tax burden falls more heavily on the side of the market that is ___________
Definition
less elastic
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