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normal goods
answer
Demand for them increases as income increases.
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inferior goods
answer
Demand for them decreases as income increases.
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substitutes
answer
As price of a good X increases, demand for product Y increases.
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complements
answer
As price of good X increases, demand for good Y decreases.
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change in demand/supply
answer
Shift of curve
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change in quantity demanded/supplied
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Movement along curve
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law of demand
answer
as price increases, quantity demanded decreases
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law of supply
answer
as price increases, quantity supplied increases
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equilibrium
answer
When quantity supplied = quantity demanded.
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shortage
answer
Quantity demanded is greater than quantity supplied.
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surplus
answer
Quantity supplied is greater than quantity demanded
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price ceilings
answer
A maximum price that sellers are allowed to charge. Only efficient if it's below equilibrium.
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price floors
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A minimum price buyers are allowed to pay for a good or service. Only efficient if it's above equilibrium.
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deadweight loss
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The lost producer and consumer surplus
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consumer surplus
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the amount a buyer is willing to pay for a good minus the amount the buyer actually pays for it
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producer surplus
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the amount a seller is paid for a good minus the seller's cost of providing it
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supply
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the amount of goods producers are willing and able and sell
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demand
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the amount of goods consumers are willing and able to buy
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elasticity of demand
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a measure of how consumers react to a change in price
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income elasticity of demand
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a measure of how much the quantity demanded of a good responds to a change in consumers' income
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cross-price elasticity of demand
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a measure of how much the quantity demanded of one good responds to a change in the price of another good
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inelastic demand
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An increase or a decrease in price will not significantly affect the amount purchased
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elastic demand
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Consumers are sensitive to a change in price
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income elasticity (positive coefficient)
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normal good
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income elasticity (negative coefficient)
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inferior good
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Cross-price elasticity (positive coefficient)
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Substitute goods
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Cross-price elasticity (negative coefficient)
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complementary goods
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Increase in supply
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The equilibrium price decreases and the equilibrium quantity increases
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decrease in demand
answer
The equilibrium price decreases and equilibrium quantity decreases.
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Increase in Demand and Decrease in Supply
answer
price increases; quantity is indeterminate
question
Increase in Demand and Increase in Supply
answer
price is indeterminate; quantity increases