1. Individual Markets: Demand and Supply Chapter 3

2. Combining Demand and Supply All markets have both demand and supply operating simultaneously. Therefore all markets, to be a market, must have both buyers and sellers at the same time.

3. Combining Demand and Supply Market Equilibrium Market equilibrium is the intersection of the demand and supply curves. Market equilibrium produces a unique equilibrium price and quantity.

4. Combining Demand and Supply Market Equilibrium At market equilibrium the quantity demanded is exactly equal to the quantity supplied.

5. Combining Demand and Supply Market Disequilibria Markets are normally in disequilibria: quantity supplied doesn’t equal quantity demanded.

6. Market Disequilibria There are two types of disequilibria Surpluses Shortages

7. Market Disequilibria Surpluses- Defined as: Quantity supplied is greater than quantity demanded.

8. Market Disequilibria Shortages- Defined as: Quantity demanded is greater than quantity supplied

9. Problem #1 1.Find the Equilibrium Price. 2.Find the Equilibrium Quantity. 3.Find the Price at which Shortages will begin. 4.Find the Price at which Surpluses will begin. PriceQuantity Demanded Quantity Supplied $100150 $820120 $64090 $460 $28030 $01000

10. Problem #2 1.Find the Equilibrium Price. 2.Find the Equilibrium Quantity. 3.What is Going on in the Market at a Price Exactly $1.00 Above the Equilibrium Price? PriceQuantity Demanded Quantity Supplied $530102 $44884 $366 $28448 $110230

11. Small Automobiles What effect will each of the following have on the demand for small automobiles? a) Small automobiles become more fashionable b) The price of large automobiles rises, with the price of small autos remaining the same

12. Small Automobiles What effect will each of the following have on the demand for small automobiles? c) Incomes decline and small autos are an inferior good d) Consumers anticipate that the price of small autos will drop sharply in the future.

13. Auto tires What effect will each of the following have on the supply of auto tires? a) A technological advance in the methods of producing tires. b) A decline in the number of firms in the tire industry.

14. Auto tires What effect will each of the following have on the supply of auto tires? c) An increase in the prices of rubber used in the production of tires. d) The expectation that the equilibrium price of auto tires will be lower in the future.

15. Auto tires What effect will each of the following have on the supply of auto tires? e) A decline in the price of the large tires used for semi trucks and earth hauling vehicles, with no change in the price of auto tires. f) A 50 cent per unit subsidy for each tire produced.

16. General demand/supply questions Draw a diagram for each problem. What will happen to equilibrium price and quantity? a) Supply decreases and demand is constant. b) Demand decreases and supply is constant.

17. General demand/supply questions Draw a diagram for each problem. What will happen to equilibrium price and quantity? c) Supply increases and demand is constant. d) Demand increases and supply is constant.

18. General demand/supply questions Draw a diagram for each problem. What will happen to equilibrium price and quantity? e) Supply increases and demand decreases. f) Demand increases and supply decreases.