Marta Buys 4 Books Per Month Answers

1. At a price of $15 each, Marta buys 4 books per month. When the price increases to $20, Marta buys 3 books per month. Luz says that Marta's demand for books has decreased. Is Luz correct? a. Yes, Luz is correct. b. No, Luz is incorrect. Marta's demand has increased. c. No, Luz is incorrect. Marta's quantity demanded has decreased, but her demand has stayed the same. d. No, Luz is incorrect. Marta's quantity demanded has increased, but her demand has stayed the same. 2. One major reason for the law of demand is that a. one price changing requires at least one other price to change in the opposite direction. b. people substitute relatively lower-priced goods for relatively higher-priced goods. c. a higher price never reduces quantity demanded by enough to lower total revenue. d. people are willing to produce more units at a higher price. 3. If Max's demand for hot dogs falls as his income rises, then for Max hot dogs are a. a bad good. b. an inferior good. c. a preferential good. d. a normal good. 4. An increase in the number of buyers in a particular market will result in a a. movement up the demand curve. b. movement down the demand curve. c. leftward shift in the demand curve. d. rightward shift in the demand curve. 5. As the price of good X rises, the demand for good Y falls. Therefore, goods X and Y are a. substitutes. b. normal goods. c. complements. d. inferior goods. 6. "As the price of apples goes up, the demand for apples goes down." The author of this statement a. implies that price and demand are unrelated. b. uses the word "demand" when he should use the word "supply." c. uses the word "demand" when he should use the words "quantity demanded." d. implies that demand and price have a direct relationship. 7. If the workers of a firm successfully negotiate an increase in wages, which of the following is most likely to happen? a. The demand curve for the product the firm produces shifts rightward. b. The demand curve for the product the firm produces shifts leftward. c. The supply curve of the product the firm produces shifts rightward. d. The supply curve of the product the firm produces shifts leftward. 8. An advance in technology causes a. a rightward shift in the supply curve. b. a leftward shift in the supply curve. c. the supply curve to go from upward sloping to vertical. d. the supply curve to go from vertical to upward sloping. 9. The fundamental reason why most supply curves are upward sloping is that a. consumers substitute lower-priced goods for higher-priced goods. b. the quantity supplied increases as more firms enter the market. c. a higher price never reduces quantity supplied by enough to lower total revenue and so higher production is motivated. d. higher production raises the opportunity costs of production and so price must rise to induce more output. 10. Oil producers expect that oil prices next year will be higher than oil prices this year. As a result, oil producers are most likely to a. place more oil on the market this year, thus shifting the present supply curve of oil rightward. b. hold some oil off the market this year, thus shifting the present supply curve of oil leftward. c. place more oil on the market this year, thus increasing the quantity supplied of oil at lower but not higher prices. d. hold some oil off the market this year, thus decreasing the quantity supplied of oil at lower but not higher prices. 11. At a price below the equilibrium price, there is a. a surplus. b. a shortage. c. excess supply. d. sub-equilibrium. 12. At a price for which quantity demanded exceeds quantity supplied, a __________ is experienced, which pushes the price __________ toward its equilibrium value. a. surplus; downward b. surplus; upward c. shortage; downward d. shortage; upward 13. If the supply of and demand for a product both decrease, then equilibrium a. quantity and equilibrium price must both decline. b. quantity must decline, but equilibrium price may either rise, fall, or remain unchanged. c. price must fall, but equilibrium quantity may either rise, fall, or remain unchanged. d. quantity must fall and equilibrium price must rise. 14. Jerry has $50,000 in his savings account and the average new car price is $23,000. Does Jerry have a demand for a new car? a. Yes, since Jerry can afford a new car. b. Not necessarily. Jerry has the ability to buy a new car, but we don't know if he also has the willingness to buy a new car. c. Yes, since Jerry's savings is more than double the average new car price. d. none of the above 15. In the market for good X there are three buyers, Adam, Bill, and Carolyn. Adam buys 3 units of good X at $4, Bill buys 7 units of good X at $4, and Carolyn buys 8 units of good X at $4. A point on the market demand curve consists of the following price-quantity combination: a. $4, 10 b. $4, 18 c. $4, 15 d. $5, 8 16. Which of the following statements is false? a. The shift factors for the supply curve are: income, preferences, prices of related goods, the number of buyers, and expectations of future price. b. A change in (own) price changes the quantity supplied of a good. c. A change in demand is graphically represented by a shift in the demand curve. d. A change in quantity demanded is represented by a movement along a given demand curve. 17. Which of the following statements is false? a. At equilibrium in a market, scarcity does not exist. b. If there is a shortage of 100 units at a price of $2 per unit, the shortage will be greater than 100 units at a price of $1 per unit. c. If there is a surplus of 30 units at a price of $3, the surplus will be less than 30 units (or even nonexistent) at a price of $2. d. If there is a surplus, suppliers will not be able to sell all they had hoped to sell at a particular price. 18. Which economic concept is the reason behind Disney World’s pricing policy involving discounts for multiple-day passes? a. the law of supply b. the law of increasing opportunity cost c. the law of diminishing marginal returns d. the law of diminishing marginal utility 19. If the price a buyer pays for a good is $50 and the maximum price she would be willing and able to pay is $53, then ____________ is _______________. a. producers’ surplus; $103 b. consumers’ surplus; $103 c. consumers’ surplus; $3 d. producers’ surplus; $3 20. What is the definition of producers’ surplus? a. price received minus maximum selling price b. maximum selling price minus price received c. price received minus minimum selling price d. highest price minus lowest price Exhibit 3-1 21. Refer to Exhibit 3-1. If the price is $10, a. sellers' inventories rise b. sellers will lower the price. c. buyers will bid up the price. d. a and c 22. Refer to Exhibit 3-1. If the price is $30, a. sellers' inventories rise. b. sellers will lower the price. c. sellers will raise the price. d. a and b 23. Refer to Exhibit 3-1. $20 is the a. equilibrium price. b. market-clearing price. c. price at which there is neither a surplus nor a shortage. d. all of the above 24. Refer to Exhibit 3-1. 300 units of X will be exchanged in this market if the price is a. $30. b. $20. c. $10. d. none of the above 25. Refer to Exhibit 3-1. At a price of $10 __________ units of the good will be exchanged. a. 100 b. 200 c. 300 d. none of the above 26. Refer to Exhibit 3-1. 100 units of X will be exchanged in this market if the price is a. $30. b. $20. c. $10. d. a and c Price (dollars) Exhibit 3-2 S1 S2 V Z W X D2 D1 Quant it y 27. Refer to Exhibit 3-2. In the market shown, if equilibrium was originally at point Z and the new equilibrium is now at point V, this change may have been caused by a. a decrease in consumers’ income (assuming that this is an inferior good) and a simultaneous decline in technology in the production of this good. b. an increase in consumers’ income (assuming that this is an inferior good) and a simultaneous improvement in technology in the production of this good. c. a decrease in consumers’ income (assuming that this is an inferior good) and no change in supply. d. an increase in consumers’ income (assuming that this is an inferior good) and no change in supply. 28. Refer to Exhibit 3-2. In the market shown, a rightward shift in supply from S1 to S2 could have been caused by a. a decline in the number of buyers in the market. b. a decline in the price of a substitute good. c. a decrease in income (assuming the good is a normal good). d. the granting of a subsidy to the producer. 29. Refer to Exhibit 3-2. In the market shown, a rightward shift in demand from D1 to D2 could have been caused by a. an increase in the number of sellers in the market. b. an improvement in technology in the production of this good. c. a decrease in buyers’ income (assuming the good is an inferior good). d. a decrease in buyers’ income (assuming the good is a normal good). 30. Refer to Exhibit 3-2. In the market shown, if equilibrium was originally at point W and is now at point X, the new equilibrium price is __________ it was originally and the new equilibrium quantity is ____________ it was originally. a. greater than; greater than b. less than; greater than c. greater than; less than d. less than; less than