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1、Answers to Text Questions and ProblemsAnswers to Review Questions1. The equilibrium price of a good is determined by the intersection of its supply and demand curves. We can know everything about a goods cost of production (that is we can know its supply curve exactly but without the demand curve we
2、 will not know the quantity people will want to purchase and therefore what the cost at the margin is for the good.LO: 3AACSB: Analytical SkillsBlooms: Application2. A change in demand means a shift of the entire demand curve, whereas a change in the quantity demanded means a movement along the dema
3、nd curve in response to a change in price.LO: 4AACSB: Analytical SkillsBlooms: Analysis3. If the price of gasoline were prevented by regulations from rising to its equilibrium level, we would expect to see symptoms of excess demand for gasoline, such as lines of cars waiting at the pumps to buy gas.
4、LO: 3AACSB: Analytical SkillsBlooms: Application4. Under the horizontal interpretation, we begin with a price for the good and then use the demand curve to read the quantity demanded at that price on the horizontal axis. Under the vertical interpretation, we start with a quantity produced and use th
5、e demand curve to read the marginal buyers reservation price for the product on the vertical axis.LO: 1AACSB: Analytical SkillsBlooms: Understanding5. It is smart for each individual at a sporting event to stand up in order to get a better view of the game. However, it is dumb for all to stand up si
6、nce no one sees any better than if all had remained seated.LO: 6AACSB: Analytical SkillsBlooms: UnderstandingAnswers to Problems1. Complements and substitutes:a. Substitutesb. Complementsc. Probably substitutes for most people, but complements for some others who like to eat ice cream and chocolate
7、together.d. SubstitutesLO: 1AACSB: Analytical SkillsBlooms: Understanding2. The supply curve would shift:a. To the right. The discovery is a technological improvement, so the improved technique would allow a farmer to use the same inputs to produce more corn.b. To the right. Fertilizer is an input,
8、so this is an example of a decrease in an input price. A decrease in input prices shifts the supply curve to the right.c. To the right. The new tax breaks make farming relatively more profitable than before, so those who were earning an income from a non-farming job that paid just a little bit more
9、than farming would switch to farming if the tax break is big enough.d. To the left. A tornado would destroy corn fields, along with infrastructure used to harvest and store it. Thus, at every given price the quantity of corn supplied would be lower and the supply curve shifts to the left.LO: 2AACSB:
10、 Analytical SkillsBlooms: Application3. The demand curve would:a. Shift to the right. Buyers income has risen and vacations are a normal good, so this increase the quantity demanded at every given price.b. Shift to the right. Buyers preferences will probably change because most people want to avoid
11、foods that cause heart disease. Thus, buyers will purchase fewer hamburgers and more pizza.c. Shift to the right. When the price of a substitute rises, the demand for a good increases i.e. shifts to the right.d. Not be affected. An increase in the price of CDs decreases the quantity demanded of CDs
12、i.e. causes a movement along the demand curve.LO: 1AACSB: Analytical SkillsBlooms: Application4. No, the supply of binoculars will not be affected. The demand for binoculars might increase due to more people wanting to spot UFOs. This will lead to an increase in the equilibrium price of binoculars a
13、nd the quantity of binoculars supplied. However, no change in the supply of binoculars should occur since nothing has changed with regard to input prices, technology, or any of the factors that determine supply.LO: 2AACSB: Analytical SkillsBlooms: Application5. Since labor is an input to orange prod
14、uction, an increase in the wage is an increase in the cost of an input. This will shift the supply curve of oranges to the left, resulting in an increase in the equilibrium price and a decline in the equilibrium quantity of oranges.LO: 4AACSB: Analytical SkillsBlooms: Application6. An increase in th
15、e birth rate will increase the population of potential buyers of land. This will shift the demand curve for land to the right and increase the equilibrium price of land.LO: 4AACSB: Analytical SkillsBlooms: Application7. The discovery will shift the demand curve for fish to the right, increasing both
16、 the equilibrium price and the equilibrium quantity of fish.LO: 4AACSB: Analytical SkillsBlooms: Application8. An increase in the price of chickenfeed shifts the supply curve of chickens to the left, resulting in an increase in the equilibrium price of chickens. Assuming that chicken is a substitute
17、 for beef, the increase in the price of chickens will shift the demand curve for beef to the right, increasing both the equilibrium price and the equilibrium quantity of beef.LO: 4AACSB: Analytical SkillsBlooms: Application9. More people want to stay in hotel rooms near campus during parents weekend
18、 and graduation weekend compared with the rest of the year. Thus the demand curve shifts to the right during these weekends, causing an increase in the equilibrium price of hotel rooms (and, of course, a higher equilibrium quantity of rooms rented.LO: 4AACSB: Analytical SkillsBlooms: Application10.
19、Automobile insurance and automobiles are complements, so an increase in automobile insurance rates will thus shift the demand curve for automobiles to the left. Some people who would have bought new automobiles with the lower insurance rates will choose instead to purchase a used car, use public tra
20、nsportation or perhaps continue driving their current vehicle.LO: 4AACSB: Analytical SkillsBlooms: Application11. The mad cow disease announcement is likely to cause many consumers to substitute chicken for beef; this will cause the demand curve for chicken to shift to the right. The discovery of th
21、e new chicken breed will cause a rightward shift in the supply curve of chicken. The two developments together will increase the equilibrium quantity of chicken sold in the United States, but we cannot determine the net effect on equilibrium price from the information given.LO: 4AACSB: Analytical Sk
22、illsBlooms: Application12. The population increase causes a rightward shift in the demand curve for potatoes while the development of the higher-yielding variety causes a rightward shift in the supply curve for potatoes. The equilibrium quantity of potatoes goes up, but the equilibrium price may go either down or up.LO: 4AACSB: Analytical SkillsBlooms: Application13. The discovery of the cold-fighting property of apples causes a rightward shift in the demand curve for apples while the fungus causes a leftward shift in the supply curve. The equilibrium price of apples
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