AP Microeconomics Flashcards: Market Equilibrium And Consumer Producer Surplus

What this deck covers

This deck focuses on Market Equilibrium And Consumer Producer Surplus, giving you a quick way to review the definitions, rules, and examples that matter most for AP Microeconomics.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: What is the effect of an increase in supply on equilibrium quantity?

Answer: Equilibrium quantity increases. Higher supply shifts the intersection point rightward.

Flashcard 2: What happens to total surplus when a tax is imposed?

Answer: Total surplus decreases. Taxes create deadweight loss, reducing overall welfare.

Flashcard 3: Find the equilibrium quantity if demand is $Q_d = 50 - P$ and supply is $Q_s = 2P$.

Answer: Equilibrium quantity $Q = 20$. Substitute $P = 10$ into either equation to find $Q$.

Flashcard 4: What is market equilibrium?

Answer: Market equilibrium is where quantity demanded equals quantity supplied. This occurs when market forces balance supply and demand.

Flashcard 5: What occurs when a market is in disequilibrium?

Answer: There is either a surplus or a shortage. Markets automatically move toward equilibrium through price changes.

Flashcard 6: What does it mean if a market is perfectly competitive?

Answer: No individual can influence the price. All participants are price takers with no market power.

Flashcard 7: State the formula for consumer surplus.

Answer: $Consumer surplus = \frac{1}{2} \times \text{base} \times \text{height}$. Area of triangle above price and below demand curve.

Flashcard 8: What happens to producer surplus when the price decreases?

Answer: Producer surplus decreases. Lower price reduces the area between price and supply curve.

Flashcard 9: What is the relationship between elasticity and deadweight loss?

Answer: More elastic demand or supply increases deadweight loss. More elastic curves respond more to price changes.

Flashcard 10: What is the impact of a subsidy on supply?

Answer: Supply increases. Subsidies effectively shift supply curve rightward.

Flashcard 11: Calculate deadweight loss if the tax is $5 and equilibrium quantity decreases by 10.

Answer: Deadweight loss = $25. Formula: $$\frac{1}{2} \times \text{tax} \times \text{quantity change}$ $.

Flashcard 12: What is the relationship between elasticity and deadweight loss?

Answer: More elastic demand or supply increases deadweight loss. More elastic curves respond more to price changes.

Flashcard 13: Find the new equilibrium after a supply decrease from $Q_s = 2P$ to $Q_s = P$.

Answer: New equilibrium price $P = 25$. Set $50 - P = P$ to find new intersection.

Flashcard 14: State the formula for consumer surplus.

Answer: $Consumer surplus = \frac{1}{2} \times \text{base} \times \text{height}$. Area of triangle above price and below demand curve.

Flashcard 15: Identify the condition for market equilibrium using a graph.

Answer: The demand curve intersects the supply curve. This intersection point determines equilibrium price and quantity.

Flashcard 16: What shifts the demand curve to the right?

Answer: An increase in consumer income or preferences. These factors increase willingness to buy at every price level.

Flashcard 17: Identify the condition for market equilibrium using a graph.

Answer: The demand curve intersects the supply curve. This intersection point determines equilibrium price and quantity.

Flashcard 18: What happens to consumer surplus when supply increases?

Answer: Consumer surplus increases. Increased supply lowers price, expanding consumer surplus area.

Flashcard 19: What is the impact of a subsidy on supply?

Answer: Supply increases. Subsidies effectively shift supply curve rightward.

Flashcard 20: Calculate consumer surplus if the willingness to pay is $50 and price is $30.

Answer: Consumer surplus = $20$. Simple subtraction: willingness to pay minus actual price paid.

Flashcard 21: What results from a price ceiling set below equilibrium price?

Answer: A shortage occurs. Quantity demanded exceeds quantity supplied at the ceiling price.

Flashcard 22: Identify the effect of a tax on the equilibrium price consumers pay.

Answer: Price consumers pay increases. Taxes shift effective supply curve, raising consumer price.

Flashcard 23: What is the role of price in a market economy?

Answer: Price signals guide resource allocation. Prices coordinate economic decisions and allocate scarce resources.

Flashcard 24: What is the effect of a non-binding price ceiling?

Answer: No effect; market remains at equilibrium. Price ceilings above equilibrium don't constrain the market.

Flashcard 25: What happens to producer surplus when demand decreases?

Answer: Producer surplus decreases. Decreased demand lowers price, reducing producer surplus area.

Flashcard 26: What results from a price ceiling set below equilibrium price?

Answer: A shortage occurs. Quantity demanded exceeds quantity supplied at the ceiling price.

Flashcard 27: What shifts the supply curve to the left?

Answer: An increase in production costs. Higher costs reduce willingness to produce at every price level.

Flashcard 28: State the formula for producer surplus.

Answer: $Producer surplus = \frac{1}{2} \times \text{base} \times \text{height}$. Area of triangle below price and above supply curve.

Flashcard 29: What is the effect of an increase in demand on equilibrium price?

Answer: Equilibrium price increases. Higher demand shifts the intersection point upward.

Flashcard 30: Calculate deadweight loss if the tax is $5 and equilibrium quantity decreases by 10.

Answer: Deadweight loss = $25. Formula: $$\frac{1}{2} \times \text{tax} \times \text{quantity change}$ $.

Flashcard 31: Which area represents consumer surplus on a supply and demand graph?

Answer: Area above the price level and below the demand curve. Triangle showing benefit from purchasing below maximum willingness.

Flashcard 32: What results from a price floor set above equilibrium price?

Answer: A surplus occurs. Quantity supplied exceeds quantity demanded at the floor price.

Flashcard 33: Identify the effect of a subsidy on the equilibrium price producers receive.

Answer: Price producers receive increases. Subsidies effectively increase the price producers receive.

Flashcard 34: Explain the impact of a binding price floor.

Answer: A binding price floor causes a surplus. Price floor above equilibrium prevents market clearing.

Flashcard 35: Identify the effect of a tax on the equilibrium price consumers pay.

Answer: Price consumers pay increases. Taxes shift effective supply curve, raising consumer price.

Flashcard 36: What is the effect of an increase in supply on equilibrium quantity?

Answer: Equilibrium quantity increases. Higher supply shifts the intersection point rightward.

Flashcard 37: What shifts the supply curve to the left?

Answer: An increase in production costs. Higher costs reduce willingness to produce at every price level.

Flashcard 38: What shifts the demand curve to the right?

Answer: An increase in consumer income or preferences. These factors increase willingness to buy at every price level.

Flashcard 39: Find the equilibrium price if demand is $Q_d = 50 - P$ and supply is $Q_s = 2P$.

Answer: Equilibrium price $P = 10$. Set $50 - P = 2P$ and solve for $P$.

Flashcard 40: Identify the effect of a subsidy on the equilibrium price producers receive.

Answer: Price producers receive increases. Subsidies effectively increase the price producers receive.

Flashcard 41: Calculate consumer surplus if the willingness to pay is $50 and price is $30.

Answer: Consumer surplus = $20. Simple subtraction: willingness to pay minus actual price paid.

Flashcard 42: What is the impact of an excise tax on supply?

Answer: Supply decreases. Taxes effectively shift supply curve leftward.

Flashcard 43: What is the role of price in a market economy?

Answer: Price signals guide resource allocation. Prices coordinate economic decisions and allocate scarce resources.

Flashcard 44: What happens to consumer surplus when the price decreases?

Answer: Consumer surplus increases. Lower price increases the area between demand curve and price.

Flashcard 45: Which area represents consumer surplus on a supply and demand graph?

Answer: Area above the price level and below the demand curve. Triangle showing benefit from purchasing below maximum willingness.

Flashcard 46: What is the effect of a non-binding price floor?

Answer: No effect; market remains at equilibrium. Price floors below equilibrium don't constrain the market.

Flashcard 47: What happens to producer surplus when demand decreases?

Answer: Producer surplus decreases. Decreased demand lowers price, reducing producer surplus area.

Flashcard 48: What does it mean if a market is perfectly competitive?

Answer: No individual can influence the price. All participants are price takers with no market power.

Flashcard 49: Explain the impact of a binding price ceiling.

Answer: A binding price ceiling causes a shortage. Price ceiling below equilibrium prevents market clearing.

Flashcard 50: What is market equilibrium?

Answer: Market equilibrium is where quantity demanded equals quantity supplied. This occurs when market forces balance supply and demand.

Flashcard 51: Which area represents producer surplus on a supply and demand graph?

Answer: Area below the price level and above the supply curve. Triangle showing benefit from selling above minimum acceptance.

Flashcard 52: What happens to consumer surplus when the price decreases?

Answer: Consumer surplus increases. Lower price increases the area between demand curve and price.

Flashcard 53: Which area represents producer surplus on a supply and demand graph?

Answer: Area below the price level and above the supply curve. Triangle showing benefit from selling above minimum acceptance.

Flashcard 54: What is the impact of an excise tax on supply?

Answer: Supply decreases. Taxes effectively shift supply curve leftward.

Flashcard 55: What is the effect of a non-binding price ceiling?

Answer: No effect; market remains at equilibrium. Price ceilings above equilibrium don't constrain the market.

Flashcard 56: What happens to consumer surplus when supply increases?

Answer: Consumer surplus increases. Increased supply lowers price, expanding consumer surplus area.

Flashcard 57: What happens to total surplus when a tax is imposed?

Answer: Total surplus decreases. Taxes create deadweight loss, reducing overall welfare.

Flashcard 58: What results from a price floor set above equilibrium price?

Answer: A surplus occurs. Quantity supplied exceeds quantity demanded at the floor price.

Flashcard 59: Explain the impact of a binding price floor.

Answer: A binding price floor causes a surplus. Price floor above equilibrium prevents market clearing.

Flashcard 60: Find the equilibrium quantity if demand is $Q_d = 50 - P$ and supply is $Q_s = 2P$.

Answer: Equilibrium quantity $Q = 20$. Substitute $P = 10$ into either equation to find $Q$.

Flashcard 61: What is the effect of a non-binding price floor?

Answer: No effect; market remains at equilibrium. Price floors below equilibrium don't constrain the market.

Flashcard 62: Calculate producer surplus if the willingness to accept is $20 and price is $30.

Answer: Producer surplus = $10. Simple subtraction: actual price received minus willingness to accept.

Flashcard 63: What is deadweight loss?

Answer: Deadweight loss is the loss in total surplus due to market inefficiency. Represents welfare lost when markets fail to reach efficiency.

Flashcard 64: What occurs when a market is in disequilibrium?

Answer: There is either a surplus or a shortage. Markets automatically move toward equilibrium through price changes.

Flashcard 65: State the formula for producer surplus.

Answer: $Producer surplus = \frac{1}{2} \times \text{base} \times \text{height}$. Area of triangle below price and above supply curve.

Flashcard 66: Define consumer surplus.

Answer: Consumer surplus is the difference between what consumers are willing to pay and what they actually pay. It measures the benefit consumers receive from purchasing goods.

Flashcard 67: Calculate producer surplus if the willingness to accept is $20 and price is $30.

Answer: Producer surplus = $10. Simple subtraction: actual price received minus willingness to accept.

Flashcard 68: Explain the impact of a binding price ceiling.

Answer: A binding price ceiling causes a shortage. Price ceiling below equilibrium prevents market clearing.

Flashcard 69: What is the effect of an increase in demand on equilibrium price?

Answer: Equilibrium price increases. Higher demand shifts the intersection point upward.

Flashcard 70: Find the equilibrium price if demand is $Q_d = 50 - P$ and supply is $Q_s = 2P$.

Answer: Equilibrium price $P = 10$. Set $50 - P = 2P$ and solve for $P$.

Flashcard 71: Define producer surplus.

Answer: Producer surplus is the difference between what producers are willing to accept and what they actually receive. It measures the benefit producers receive from selling goods.

Flashcard 72: Define producer surplus.

Answer: Producer surplus is the difference between what producers are willing to accept and what they actually receive. It measures the benefit producers receive from selling goods.

Flashcard 73: What happens to producer surplus when the price decreases?

Answer: Producer surplus decreases. Lower price reduces the area between price and supply curve.

Flashcard 74: Find the new equilibrium after a supply decrease from $Q_s = 2P$ to $Q_s = P$.

Answer: New equilibrium price $P = 25$. Set $50 - P = P$ to find new intersection.