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Issues in Economics Today
Issues in Economics Today
Robert Guell, Indiana State University

Elasticity, Consumer Surplus, and Producer Surplus

Glossary


consumer surplus  The value you get that is in excel of what you pay to get it.
cost-price elasticity of demand  The responsiveness of quantity demanded of one good to a change in the price of another good.
deadweight loss  The loss in societal welfare associated with production being to little or too great.
elastic  The condition of demand when the percentage change in quantity is larger than the percentage change in price.
elasticity  The responsiveness of quantity to a change in another variable.
income elasticity of demand  The responsiveness of quantity demanded to a change in income.
inelastic  The condition of demand when the percentage change in quantity is smaller than the percentage change in price.
perfectly elastic  The condition of demand when price cannot change.
perfectly inelastic  The condition of demand when prices changes have no effect on quantity.
price elasticity of demand  The responsiveness of quantity demanded to a change in price.
price elasticity of supply  The responsiveness of quantity supplied to a change in price.
producer surplus  The money the firm gets that is in excess of its marginal costs.
total expenditure rule  If the price and the amount you spend both go in the same direction, then demand is inelastic, whereas if they go in opposite directions, demand is elastic.
unitary elastic  The condition of demand when the percentage change in quantity is equal to the percentage change in price.




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