# A change in the price of pizza would not shift this

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A change in the price of pizza would not shift this supply curve; it would only move from 21

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one point to another along the same supply curve. 4. If the price of tomatoes rises, the supply curve for pizza shifts to the left because of the increased price of an input into pizza production, but there is no effect on demand. The shift to the left of the supply curve causes the equilibrium price to rise and the equilibrium quantity to decline, as Figure 3 shows. If the price of hamburgers falls, the demand curve for pizza shifts to the left because the lower price of hamburgers will lead consumers to buy more hamburgers and less pizza, but there is no effect on supply. The shift to the left of the demand curve causes the equilibrium price to fall and the equilibrium quantity to decline, as Figure 4 shows. Figure 3 Figure 4 Questions for Review 1. A competitive market is a market in which there are many buyers and many sellers of an identical product so that each has a negligible impact on the market price. Other types of markets include monopoly, in which there is only one seller, oligopoly, in which there are a few sellers that do not always compete aggressively, and monopolistically competitive markets, in which there are many sellers, each offering a slightly different product. 22
2. The quantity of a good that buyers demand is determined by the price of the good, income, the prices of related goods, tastes, expectations, and the number of buyers. 3. The demand schedule is a table that shows the relationship between the price of a good and the quantity demanded. The demand curve is the downward-sloping line relating price and quantity demanded. The demand schedule and demand curve are related because the demand curve is simply a graph showing the points in the demand schedule. The demand curve slopes downward because of the law of demand—other things equal, when the price of a good rises, the quantity demanded of the good falls. People buy less of a good when its price rises, both because they cannot afford to buy as much and because they switch to purchasing other goods. 4. A change in consumers' tastes leads to a shift of the demand curve. A change in price leads to a movement along the demand curve. 5. Since Popeye buys more spinach when his income falls, spinach is an inferior good for him. Since he buys more spinach, but the price of spinach is unchanged, his demand curve for spinach shifts out as a result of the decrease in his income. 6. The quantity of a good that sellers supply is determined by the price of the good, input prices, technology, expectations, and the number of sellers. 7. A supply schedule is a table showing the relationship between the price of a good and the quantity a producer is willing and able to supply. The supply curve is the upward-sloping line relating price and quantity supplied. The supply schedule and the supply curve are related because the supply curve is simply a graph showing the points in the supply schedule.

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• Spring '14

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