Question 1

Figure 3.4.1 -Refer to Figure 3.4.1 above. The consumer chooses A on budget line I₁ and B on budget line I₂. Which of the following statements is NOT true?

Accepted Answer

The figure does not provide information about the consumer's preferences between B and C, so statement B may or may not be true. However, A is on a higher indifference curve than C, so D cannot be preferred to A. Therefore, statement D is true and A is preferred to C.

Question 2

Roberta lives alone on a deserted island. She can spend her time gathering coconuts or bananas. She has 16 hours available each day and can gather 4 coconuts in an hour or 8 bananas in an hour. Diagram Roberta's budget constraint. Given that Roberta's Marginal Utility of bananas is always 25 and her Marginal utility of coconuts is always 100, what is her optimal consumption? One day an individual from a neighboring island arrives by boat and offers to exchange any number of fruits at a rate of 1 coconut for 1 banana. Diagram Roberta's budget constraint at this exchange rate assuming she will now spend all her time gathering bananas. Is Roberta better off? What does she consume?

Accepted Answer

The answer of Roberta lives alone on a deserted island....

Question 3

Figure 3.4.1
-Refer to Figure 3.4.1 above. The consumer chooses A on budget line I1 and B on budget line I2. Which of the following statements is NOT true?

Accepted Answer

If the consumer chooses A on budget line I1 and B on budget line I2, it means that A and B are on the same indifference curve and both options are affordable. Therefore, the consumer is indifferent between A and B. As a result, statement B cannot be true because A and B are equally preferred.

Question 4

If Px = Py, then when the consumer maximizes utility,

Accepted Answer

When a consumer maximizes utility given a budget constraint, the marginal utility per dollar spent on each good must be equal. This is represented by the condition MU(X)/Px = MU(Y)/Py. If Px = Py, then for utility maximization, MU(X) must equal MU(Y).

Question 5

A study of satisfaction with life across income classes in the United States showed that:

Accepted Answer

The study found that happiness increased with income, but at a decreasing rate. This means that while having more money generally leads to greater happiness, the positive effect on happiness diminishes as income levels increase.

Question 6

Scenario 3.1:
Andy derives utility from two goods, potato chips (Qp) and Cola (Qc). Andy receives zero utility unless he consumes some of at least one good. The marginal utility that he receives from the two goods is given as follows:
 
-Refer to Scenario 3.1. If the price of potato chips is $0.50 and the price of Cola is $4.00, and Andy has an unlimited income, how many units of potato chips will he consume?

Accepted Answer

To maximize his utility, Andy should consume the goods until the point where the ratio of the marginal utility to the price is equal for both goods. This means that:

MU of potato chips / price of potato chips = MU of Cola / price of Cola

Plugging in the given marginal utilities and prices, we get:

(6 / 0.5) = (18 / 4)

12 = 4.5

This is not true, so Andy should not consume an equal amount of both goods. Instead, he should consume more potato chips, as they have a higher marginal utility per dollar spent. To find the optimal consumption of potato chips, we can use the marginal utility of the last unit consumed of each good:

MU of last potato chip = 6
MU of last Cola = 2

Since the price of potato chips is $0.50, which is less than the marginal utility of the last unit consumed, Andy should consume more potato chips. We know that Andy will not stop consuming potato chips until the marginal utility falls below $0.50. So, Andy will consume potato chips until the point where the marginal utility of potato chips is equal to $0.50, which occurs at 6 units. Therefore, the answer is B) 6 units of potato chips.

Question 7

A system of rationing:

Accepted Answer

Rationing creates winners and losers, as some consumers may receive more or less of the rationed good than they would in a free market system. This can lead to inefficiencies and dissatisfaction among consumers.

Question 8

When a person consumes two goods (A and B), that person's utility is maximized when the budget is allocated such that:

Accepted Answer

The principle of equimarginal utility states that a consumer maximizes utility when the ratio of the marginal utilities of two goods is equal to the ratio of their prices. This can be expressed as MUa / Pa = MUb / Pb or MUa / MUb = Pa / Pb. Therefore, the correct choice is D, which states that the ratio of the marginal utility of A to the price of A equals the ratio of the marginal utility of B to the price of B.

Question 9

Pedro buys market basket A that includes 10 books at a price of $20 per book and 10 DVDs at a price of $10 per DVD. Market basket B contains 12 books and 12 DVDs. Based on this information, which of the following statements is NOT true?

Accepted Answer

Revealed preference analysis implies that Pedro prefers basket B to basket A regardless of the price. Therefore, option A is not true. Option B is true as Pedro prefers basket B. Option C is not necessarily true as we do not know the price of basket B. Option D is also true as long as Pedro still prefers basket C over basket A, even if they cost the same as basket B.

Question 10

If a consumer must spend her entire income on some combination of two commodities and chooses to spend it all on just one of the commodities then:

Accepted Answer

The consumer's decision to spend all income on one commodity suggests that this commodity generates more utility per dollar than the other, indicating a higher marginal utility per dollar spent compared to the alternative. This is a fundamental principle of consumer choice theory, where individuals allocate their budget to maximize total utility.

Question 11

Oscar consumes only two goods, X and Y. Assume that Oscar is not at a corner solution, but he is maximizing utility. Which of the following is NOT necessarily true?

Accepted Answer

The price ratio Px/Py does not necessarily equal Oscar's money income. This statement assumes that Oscar spends all of his money on only X and Y, whereas in reality, he may have other sources of income and may choose to spend his money on other goods as well. Therefore, the price ratio cannot be equated with his money income in general.

Question 12

The revealed preference approach can provide more informative comparisons of market baskets if we also assume that the consumer's indifference curves are:

Accepted Answer

The revealed preference approach assumes that consumers' choices reveal their preferences. Assuming that indifference curves are convex (to the origin) is consistent with the principle of diminishing marginal rate of substitution, which is a fundamental assumption in consumer theory. This convexity implies that as a consumer consumes more of one good, the amount of the other good they are willing to give up to get an additional unit of the first good decreases. This assumption helps in making more informative comparisons of market baskets by reflecting more realistic consumer behavior.

Question 13

A system of rationing:

Accepted Answer

Rationing is designed to ensure a fair distribution of scarce goods, giving everyone an equal opportunity to purchase them, regardless of income.

Question 14

Figure 3.4.2
-Refer to Figure 3.4.2 above. From an initial position at point A, the positions the consumer chooses as her budget line changes let us conclude that:

Accepted Answer

As the budget line shifts inward, the consumer chooses market baskets that are on the higher indifference curve, indicating a preference for the goods in the top shaded area. As the budget line shifts outward, the consumer chooses market baskets that are on the lower indifference curve, indicating a preference for the goods in the bottom shaded area. Therefore, all market baskets in the top shaded area are preferred to A when the budget line shifts inward, and all market baskets in the bottom shaded area are preferred to A when the budget line shifts outward. Hence, option D is the correct choice.

Question 15

Denise is shopping for lobsters and eclairs. When she faces budget line b₁, she chooses market basket A over market basket B. When she faces budget line b₂, she chooses basket B over basket C. Which assumption of consumer theory helps us determine Denise's preference ordering over basket A and basket C?

Accepted Answer

Transitivity helps us determine Denise's preference ordering over basket A and basket C because it implies that if Denise prefers A over B and B over C, then she must prefer A over C.

Question 16

Scenario 3.1:
Andy derives utility from two goods, potato chips (Qp) and Cola (Qc). Andy receives zero utility unless he consumes some of at least one good. The marginal utility that he receives from the two goods is given as follows:
 
-Refer to Scenario 3.1. What is the total utility that Andy will receive if he consumes 5 units of potato chips (Qp) and no Cola drink (Qc)?

Accepted Answer

The answer of Scenario 3.1:
Andy derives utility from two goods,...

Question 17

The principle of revealed preference would say that if Xavier chooses market basket A over market basket B then:

Accepted Answer

The principle of revealed preference suggests that if an individual chooses one option over another, particularly when the chosen option is more expensive, it indicates a stronger preference for the chosen option. Thus, if Xavier chooses market basket A over B, and A is more expensive, it implies he prefers A over B.

Question 18

Tammy and Tad's father has given each of them a debit card and allows each of them to use the card to spend $500 each month. Tammy and Tad use their $500 to buy only CDs and gasoline. In February, the price of a CD was $10 and the price of gasoline was $1 per gallon. At these prices, Tammy purchased 45 CDs and 50 gallons of gas. Tad consumed 20 CDs and 300 gallons of gas. For the month of March, Tammy and Tad's father lost the records indicating who had which debit card. From the bank statement in March, their father learned that the price of a CD was $12 and a gallon of gas cost $0.80. The first debit card was used to purchase 235 gallons of gas and 26 CDs. The second debit card was used to purchase 265 gallons of gas and 24 CDs. Using revealed preference theory, identify which card Tammy must possess.

Accepted Answer

The answer of Tammy and Tad's father has given each...

Question 19

Marginal utility measures:

Accepted Answer

Marginal utility measures the additional satisfaction or utility gained from consuming one more unit of a good.

Question 20

Scenario 3.1:
Andy derives utility from two goods, potato chips (Qp) and Cola (Qc). Andy receives zero utility unless he consumes some of at least one good. The marginal utility that he receives from the two goods is given as follows:
 
-Refer to Scenario 3.1. If the price of potato chips is $0.50 and the price of Cola is $4.00, and Andy has an income of $14.50, how many units of potato chips will he consume?

Accepted Answer

The answer of Scenario 3.1:
Andy derives utility from two goods,...

Quiz 3: Consumer Behavior

Figure 3.4.1 -Refer to Figure 3.4.1 above. The consumer chooses A on budget line I₁ and B on budget line I₂. Which of the following statements is NOT true?

Figure 3.4.1 -Refer to Figure 3.4.1 above. The consumer chooses A on budget line I1 and B on budget line I2. Which of the following statements is NOT true?

If Px = Py, then when the consumer maximizes utility,

A study of satisfaction with life across income classes in the United States showed that:

A system of rationing:

When a person consumes two goods (A and B) , that person's utility is maximized when the budget is allocated such that:

Pedro buys market basket A that includes 10 books at a price of $20 per book and 10 DVDs at a price of $10 per DVD. Market basket B contains 12 books and 12 DVDs. Based on this information, which of the following statements is NOT true?

If a consumer must spend her entire income on some combination of two commodities and chooses to spend it all on just one of the commodities then:

Oscar consumes only two goods, X and Y. Assume that Oscar is not at a corner solution, but he is maximizing utility. Which of the following is NOT necessarily true?

The revealed preference approach can provide more informative comparisons of market baskets if we also assume that the consumer's indifference curves are:

A system of rationing:

Figure 3.4.2 -Refer to Figure 3.4.2 above. From an initial position at point A, the positions the consumer chooses as her budget line changes let us conclude that:

The principle of revealed preference would say that if Xavier chooses market basket A over market basket B then:

Marginal utility measures: