📚 Quick Study Guide: Market Equilibrium Essentials
- ⚖️ Market Equilibrium: The state where quantity demanded equals quantity supplied ($Q_D = Q_S$). At this point, there is no tendency for price or quantity to change.
- 📈 Demand: The quantity of a good or service that consumers are willing and able to purchase at various prices during a specific period.
- 📉 Law of Demand: As price increases, quantity demanded decreases (inverse relationship).
- 📊 Supply: The quantity of a good or service that producers are willing and able to offer for sale at various prices during a specific period.
- ⬆️ Law of Supply: As price increases, quantity supplied increases (direct relationship).
- 💰 Equilibrium Price: The price at which quantity demanded equals quantity supplied. Also known as the market-clearing price.
- 📏 Equilibrium Quantity: The quantity demanded and supplied at the equilibrium price.
- 📦 Surplus: Occurs when quantity supplied exceeds quantity demanded ($Q_S > Q_D$) at a given price, leading to downward pressure on price.
- ⚠️ Shortage: Occurs when quantity demanded exceeds quantity supplied ($Q_D > Q_S$) at a given price, leading to upward pressure on price.
- ➡️ Shifts in Demand: Caused by changes in non-price determinants like consumer income, tastes, prices of related goods, expectations, and number of buyers. Shifts the entire demand curve.
- ⬅️ Shifts in Supply: Caused by changes in non-price determinants like input prices, technology, government policies (taxes/subsidies), expectations, and number of sellers. Shifts the entire supply curve.
- 🛑 Price Controls: Government-imposed limits on prices (e.g., price ceilings cause shortages, price floors cause surpluses if set above equilibrium).
🧠 Practice Quiz: Test Your Knowledge
Choose the best answer for each question.
What is the term for the point where the quantity demanded equals the quantity supplied in a market?
A. Price ceiling
B. Price floor
C. Market equilibrium
D. Market surplus
According to the law of demand, if the price of a good increases, what typically happens to the quantity demanded?
A. It increases.
B. It decreases.
C. It remains unchanged.
D. It shifts the demand curve to the right.
If the market price of a product is currently above the equilibrium price, what situation exists?
A. A shortage
B. A surplus
C. Market equilibrium
D. An increase in demand
Which of the following would cause the supply curve for smartphones to shift to the right?
A. An increase in the price of smartphone components.
B. A decrease in consumer income.
C. An improvement in smartphone manufacturing technology.
D. An increase in the price of smartphones.
When the demand curve shifts to the right and the supply curve shifts to the left simultaneously, what is the definite effect on the equilibrium price?
A. It will decrease.
B. It will increase.
C. It will remain unchanged.
D. The effect is indeterminate.
A binding price ceiling is set below the equilibrium price. What is the most likely outcome?
A. A surplus of the good.
B. A shortage of the good.
C. An increase in the equilibrium quantity.
D. No effect on the market.
If consumers expect the price of a popular video game to significantly drop next month, what will likely happen to the demand for the game today?
A. The demand curve will shift to the right.
B. The demand curve will shift to the left.
C. There will be a movement down along the demand curve.
D. There will be no change in demand.
Click to see Answers
1. C
2. B
3. B
4. C
5. B
6. B
7. B
