##### Explain the differences between a change in supply and a change in quantity supplied.

1. Explain the differences between a change in supply and a change in quantity supplied. (2 pts)

2. Indicate whether each of the following situations would shift the supply curve to the left, to the

right, or not at all. (3 pts) a. An increase in price of inputs b. An increase in the number of firms in the market c. An increase in the price of substitutes in production d. A decrease in the current price of the product e. A decrease in productivity f. A decrease in the expected future price of the product

3. If there is excess demand in a perfectly competitive market, does the government need to

intervene to restore the equilibrium price and quantity? Why or why not? (2 pts)

4. Suppose the equilibrium price and quantity of bicycles is determined at \$40 and 200 units, respectively. For some reason, the market price of the bicycles initially increases to \$60 and then decreases to \$20. How will these deviations from the equilibrium price be corrected in a perfectly competitive market? Explain with the help of suitable diagrams. (3 pts)

5. In each of the following situations, graphically show and explain what will happen to the

equilibrium price and the equilibrium quantity for a particular product, which is an inferior good. (5 pts)

a. The population decreases and productivity increases b. Income increases and the price of inputs increase c. The number of firms in the market decreases and income decreases d. Consumer preference decreases and the expected future price increases e. The price of a substitute in consumption increases and the price of a substitute in production

increases

6. Using graphs, explain how the equilibrium price and quantity of MP3 will change when: (5 pts) a. The demand curve for MP3 players shifts to the left and the supply curve for MP3 players

shift to the right. b. The demand curve for MP3 players shifts to the right and the supply curve for MP3 players

shift to the left, but the supply curve shifts more than the demand curve. c. The demand curve for MP3 players shifts to the right and the supply curve for MP3 players

shift to the left, but the supply curve shifts less than the demand curve. d. Both the demand curve and the supply curve for MP3 players shift to the left but the

demand curve shifts more than the supply curve. e. Both the demand curve and the supply curve for MP3 players shift to the right but the

supply curve shifts more than the demand curve.