WELFARE ECONOMICS
branch of economics that studies how the allocation of resources affects economic well-being
WILLINGNESS TO PAY / RESERVATION PRICE
maximum price a consumer will pay for a good or service
CONSUMER SURPLUS
difference between the willingness to pay for a good (or service) and the price paid to get it
WILLINGNESS TO SELL
minimum price a seller will accept to sell a good or service
PRODUCER SURPLUS
difference between the willingness to sell a good or service and the price the seller receives
TOTAL SURPLUS / SOCIAL WELFARE
adding consumer and producer surplus
EFFICIENT
When an allocation of resources maximizes total surplus
EQUITY
fairness of the distribution of benefits among the members of a society
EXCISE TAXES
taxes levied on a particular good or service
INCIDENCE
the burden of taxation on the party who pays the tax through higher prices, regardless of whom the tax is actually levied on
DEADWEIGHT LOSS
decrease in economic activity caused by market distortions, such as taxes
ELASTICITY
A measure of the responsiveness of buyers and sellers to changes in price or income; measures “how much”
ELASTIC
quantity demanded changes significantly as a result of a price change
INELASTIC
quantity demanded changes a small amount as a result of a price change
IMMEDIATE RUN
no time for consumers to adjust their behavior to market price changes
SHORT RUN
make decisions that reflect our immediate or short-term wants, needs, or limitations; Can partially adjust behavior
LONG RUN
make decisions that reflect our needs, wants, and limitations over a long time horizon; Has time to fully adjust to market conditions
DETERMINANTS OF DEMAND
substitutes, the share of the budget spent on the good, necessities versus luxury goods, whether the market is broadly or narrowly defined, and time
INCOME ELASTICITY OF DEMAND (EI)
measures how a change in income affects spending
CROSS-PRICE ELASTICITY OF DEMAND (EC)
measures the percentage change in the quantity demanded of one good to the percentage change in the price of a related good
TOTAL REVENUE
measure of the responsiveness of the quantity supplied to a change in price
PRICE ELASTICITY OF SUPPLY
measure of the responsiveness of the quantity supplied to a change in price