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Econ Exam III
Chapters 7, 9, 19,11, 12, and 21
47
Economics
Undergraduate 1
03/27/2008

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Term
elasticity
Definition
how much a percentage change in price leads to a percentage change in quantity demanded or quantity supplied
Term
elasticity of demand
Definition
the percentage change in quantity demanded divided by the percentage change in price
Term
elasticity of supply
Definition
the percentage change in quantity supplied divided by the percentage change in price
Term
elastic
Definition
the elasticity calculated form the appropriate formula has an absolute value greater than one
Term
infinite elasticity
Definition
the extremely elastic situation where quantity changes by an infinit amount in response to any change in price
Term
inelastic
Definition
the elasticity calculated from the appropriate formula has an absolute value less than one
Term
zero elasticity
Definition
the highly inelastic case in which a percentage change in price, no matter how large, results in zero change in the quantity
Term
normal good
Definition
a good where the quantity demanded rises when income rises
Term
inferior good
Definition
a good wher ethe quantity demanded declines as income increasese
Term
cross-price elasticity of demand
Definition
the percentage change in the quantity of good A that is demanded as a result of a percentage change i good B.
Term
elasticity of labor supply
Definition
the percentage change in thours worked divided by the percentage change in wages.
Term
elasticity of savings
Definition
the percentage change in the quantity of savings divided by the percentage change in interest rates
Term
price elasticity of demand
Definition
same as elasticity of demand
Term
perfect competition
Definition
each firm facesa many competitors that sell identical products
Term
monopoly
Definition
a firm that faces no competitors
Term
monopolistic competition
Definition
where many firms sell similar but differentiated products.
Term
oligopoly
Definition
a small number of firms sell a similar product but face no other ocmpetition
Term
fixed costs
Definition
expenditures that must be made before production starts and that do not change regardless of the level of production.
Term
variable costs
Definition
costs of production that increase with the quantity produced
Term
diminishing marginal returens
Definition
when the marginal gain in output diminshes as each additional unit of input is added
Term
average cost
Definition
total cost divided by the quantity of output
Term
average variable cost
Definition
variable cost divided by the quantity of output
Term
marginal cost
Definition
the addtiional cost of producing one more unit
Term
production technologies
Definition
alternative methods of combind inputs to produce output.
Term
economies of scale
Definition
as the quantity of putput rises, the average cost of production falls
Term
increasing returns to scale
Definition
when a larger-cale firm can produce at a lower cost than asmaller-cscale firm, also called economies of scale
Term
contant returns to scale
Definition
when expaniding all inputs does not change the average cost of produciton.
Term
diseconomies of scale/decreasing returns to scale
Definition
as the quantity of output rises, the average cost of production rises.
Term
perfect competition
Definition
each firm faces many competitors that sell identical products
Term
price takers
Definition
a firm in a perfectly competitive market that must take the prevailing market price as given
Term
profit=total revenue-total cost
Definition
price*Qsupplied-avg cost* quantity supplied
Term
marginal revenue
Definition
the additional revenue gained from selling one more unit
Term
marginal revenue
Definition
total revenue divided by quantity
Term
marginal cost
Definition
marginal change total cost/marginal change avg. quantity
Term
shutdown point
Definition
when the revenue a firm recieves does not cover its average variable costs, the firm should shut down immediately; the point where the marginal cost curve crosses the aveage variable cost curve
Term
entry
Definition
the long-run process of firms beginning and expanding production in response to a sustrained apttern of profits
Term
imperfect competition
Definition
not perfect
Term
barriers to entry
Definition
legal, technical or market forces that may discourage others to enter
Term
patent
Definition
a government rule that gives the inventor rights for a given time
Term
trademark
Definition
a word name or symbol that indicates that goods are registerd for a certain firm
Term
intellectual property
Definition
the body of law including patents, trademarks copyrights and trade secret law that protect the right of inventros t oproduce and sell their inventions
Term
predatory priceing
Definition
when an existing firm uses sharp but temporary price cuts to discourage new comp.
Term
collusion
Definition
when firms act together to reduce output and keep prices high
Term
cartel
Definition
a group of firms that collude toproduce the monopoly output and sell at the monopoly price
Term
game theory
Definition
players msut make decisions and then recieve payoffs
Term
prisoner's dilemma
Definition
a game in which the gains from cooperation are alrger than the rewards from pursuing self-interest
Term
kinked demand curve
Definition
a perceived demand curve that arises when competing oligopoly firms commit to match price cuts, but not price increases
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