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Chapter 3 Set
The Concept of Elasticity and Consumer and Producer Surplus
21
Economics
Undergraduate 1
05/05/2013

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Term
elasticity
Definition
the responsiveness of quantity to a change in another variable
Term
price elasticity of demand
Definition
the responsiveness of quantity demanded to a change in price
Term
price elasticity of supply
Definition
the responsiveness of quantity supplied to a change in price
Term
income elasticity of demand
Definition
the responsiveness of quantity to a change in income
Term
cross price elasticity
Definition
the responsiveness of quantity of one good to a change in the price of another good
Term
elastic
Definition
the circumstance when the percentage change in quantity is larger than the percentage change in price
Term
inelastic
Definition
the circumstance when the percentage change in quantity is smaller than the percentage change in price
Term
unitary elastic
Definition
the circumstance when the percentage change in quantity is equal to the percentage change in price
Term
total expenditure rule
Definition
if the price and the amount you spend both go i the same direction then demand is inelastic whereas if they go in opposite directions demand is elastic
Term
perfectly inelastic
Definition
the condition of the demand when price changes have no effect on quantity
Term
perfectly elastic
Definition
the condition of demand when price cannot change
Term
consumer surplus
Definition
the value you get that is in excess of what you pay to get it
Term
producer surplus
Definition
the money the firm gets that is in excess of its marginal cost
Term
market failure
Definition
the circumstance where the market outcome is not the economically efficient outcome
Term
exclusivity
Definition
the degree to which the consumption of the good can be restricted by a seller to only those who pay for it
Term
rivalry
Definition
the degree to which one persons consumption reduces the value of the good for the next consumer
Term
purely private good
Definition
a good with the characteristics of both exclusivity and rivalry
Term
purely public good
Definition
a good with neither of the characteristics of exclusivity or rivalry
Term
excludable public good
Definition
a good with the characteristic of exclusivity but not of rivalry
Term
congestible public good
Definition
a good with the characteristics of rivalry but not of exclusivity
Term
deadweight loss
Definition
the loss in societal welfare associated with production being too little or too great
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