ECON 100A Lecture Notes - Lecture 26: Tangent, Indifference Curve

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10 Apr 2020

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Why tangency? if mrs > p1 / p2 you are willing to pay more for x1 in terms of x2 than the market should make the trade! Have to give up p1 / p2 units of good 2 to get 1 more unit of good 1. If mrs is larger, then my willingness to pay for one more unit of good 1 is actually higher than what the market would require, so that cannot be the optimum. Better than set: = {(x1, x2): u(x1, x2) u(x1. Note that the indifference curve through (x1: = {(x1, x2): u(x1, x2) > u(x1. 0, x2: is included in the as-good set but not the better-t. All of the blue shaded area points are as good as the points on the indifference curve by transitivity (since they are better, it is also as good as) Better than set does not include the points on the indifference cure.

Related Questions

Suppose all consumers are maximizing utility with convex indifference curves. All face the same prices, and are perfectly rational. According to microeconomic models, at the maximization bundle they should

A. All have the same marginal rate of substitution

B. All buy more of the least expensive good

C. All end up with the same bundle of goods

D. All have the same level of satisfaction

Consider an indifference map with food on the vertical axis and shelter on the horizontal axis.

If a consumer is willing to give up 3 units of food in exchange for 1 unit of shelter and food is priced at $5 per unit and shelter at $10 per unit, then the consumer is:

A. Purchasing too much food for utility maximization

B. Purchasing too much shelter for utility maximization

C. Purchasing just the right amount of each good for utility maximization

D. Purchasing less than the budget would allow

If a consumer with convex indifference curves moves along her budget line, closer and closer to the horizontal axis, as she is moving:

		A. The marginal utility she gets from good Y declines.
		B. The marginal utility she gets from good X declines.
		C. The marginal utility she gets from good X increases.
		D. The price ratio of the two goods changes.

Q1 after Alistair earned his BA, he had to decide whether to accept the offer of a job that will pay him $45,000 per year or spend an additional two years earning an MBA. If he decides to pursue the graduate degree, his annual expenses for tuition, books, board, and lodging will be $32,000. Alistair has been offered a scholarship for $10,000 per year, but to pay the remaining $22,000 per year, he would have to cash in savings bonds that his grandparents have given him that have been earning $500 in interest per year. The annual opportunity cost of earning his MBA is:

1-$67,500.

2- $77,000.

3-$99,000.

4-$77,500.

Q3 Which statement about opportunity cost is NOT true?

1-Opportunity cost may be larger than monetary cost.

2-Opportunity cost includes both explicit and implicit costs.

3-The real or opportunity cost of something is what you must give up to get it.

4-Opportunity cost is synonymous with explicit costs.

Q3 If goods A and B are substitutes, a decrease in the price of good B will

increase the demand for good A.

increase the demand for good B.

decrease the demand for good A.

increase the demand for good B and decrease the demand for good A.

Q4 Suppose that, as incomes in a community increase, the demand for taxi service increases and the demand for bus service decreases. From this, it can be concluded that:

Both taxi service and bus service are inferior goods.

Both taxi service and bus service are normal goods.

Taxi service is a normal good; bus service is an inferior good.

Taxi service is an inferior good; bus service is a normal good.

Q5In economics, a marginal value refers to:

the value associated with an unimportant, or marginal, activity.
	a value entered as an explanatory item in the margin of a balance sheet or other accounts.
	the value associated with one more unit of an activity.
	a value that is most appropriately identified in a footnote. Q6 The terms decrease in demand and decrease in quantity demanded can be used interchangeably. True or false

plumgoldfish5

Michael spends all of his income on coffee and donuts. A coffee costs $2.50 and a donut costs $2.00. At his current consumption level, the marginal utility for coffee is 30 utils, and the marginal utility for a donut is 60 utils. Which statement best describes what Michael needs to do to maximize his utility?

Question 1 options:

1)	buy less of both coffee and donuts.

2)	buy less coffee and more donuts.

3)	buy more coffee and less donuts.

4)	spend the same amount on coffee as he does on donuts.

Question 2

What is it called when the marginal utility derived from the last dollar spent on each good is the same across all goods and the last dollar spent uses all of the available budget for the purchase of those goods?

Question 2 options:

1)	the optimal consumption bundle.

2)	the optimal production bundle.

3)	diminishing marginal utility.

4)	optimal point.

Question 3 (1 point)

What does the economic theory of marginal utility infer?

Question 3 options:

1)	consumers naturally know which consumption choices will maximize their utility.

2)	consumers who watch market trends are better at maximizing their utility than are those who do not watch those trends.

3)	one cannot maximize utility without taking an economics class that explains utility theory.

4)	one cannot maximize utility without doing the math of calculating the ratios of marginal utility divided by price.

Question 4

Kate is addicted to chocolate and does not care how much it costs. In fact, she spends more than $20 a week on chocolate. What can be concluded about elasticity in her buying decisions?

Question 4 options:

1)	Her income elasticity of demand for chocolate is equal to one.

2)	Her income elasticity of demand for chocolate is equal to zero.

3)	Her price elasticity of demand for chocolate is equal to one.

4)	Her price elasticity of demand for chocolate is equal to zero.

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Question 5 (1 point)

Why does the demand for a good become relatively more elastic?

Question 5 options:

1)	substitutes for the good become more available.

2)	substitutes for the good become less available.

3)	the good becomes more of a necessity.

4)	the time allowed for adjustment is shortened.

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Question 6 (1 point)

Assume the price of chicken per pound is $3.49 and that Americans purchase 10 million pounds per chicken every month. If the price of chicken increases to $5.49 per pound, identify what will occur to consumer surplus?

Question 6 options:

1)	consumer surplus increases.

2)	consumer surplus decreases.

3)	consumer surplus creates incentive to save.

4)	consumer surplus creates incentive to spend.

Question 7 (1 point)

What is another name for the difference between the price that consumers are willing to pay for a good and a lower price that they may actually have to pay?

Question 7 options:

profit.

revenue.

3)	consumer utility.

4)	consumer surplus.

Question 8

Adam, Brian, Robert, and Sam all want to attend a football game. The admission price is $48. Adam is willing to pay $59 for the ticket. Brian is willing to pay $39. Robert is willing to pay $45, and Sam is willing to pay $55. Based on this information, who will go to the game?

Question 8 options:

1)	Adam, Brian, Robert, and Sam.

2)	Brian and Robert.

3)	Adam and Sam.

4)	Brian, Robert, and Sam.

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Question 9 (1 point)

Lily is willing to pay $10 for one bracelet and $5 for a second. Patty is willing to pay $12 for one bracelet and $2 for a second. If the price is currently $8 per bracelet, identify what is the total consumer surplus after Lily and Patty make their purchases?

Question 9 options:

Question 10 (1 point)

Manfred is willing to shovel one driveway for $25, a second for $30, and a third for $35. Assume that the market rate for shoveling driveways is $32. How many driveways will Manfred shovel, what will be his total revenue, and what will be his producer surplus?

Question 10 options:

1)	Manfred will shovel two driveways for a total revenue of $64 and his producer surplus will be $9.

2)	Manfred will shovel three driveways for a total revenue of $75 and his producer surplus will be $12.

3)	Manfred will shovel three driveways for a total revenue of $96 and his producer surplus will be $5.

4)	Manfred will shovel four driveways for a total revenue of $125 and his producer surplus will be $18.

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Question 11 (1 point)

What would the difference between the price that producers receive and the lower price at which they are willing to sell the good be called?

Question 11 options:

1)	producer shortage.

2)	producer surplus.

3)	consumer shortage.

4)	consumer surplus.

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Question 12 (1 point)

What will happen when there is an increase in the price of eBook downloads?

Question 12 options:

1)	It reduces the marginal utility derived from each dollar spent on eBooks.

2)	It reduces the marginal utility derived from each hardcopy book purchased.

3)	There will not be a substitution effect.

4)	There will not be a change in the number of eBooks in the set of consumption possibilities.

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Question 13 (1 point)

When is price elasticity of demand utilized to measure how an individual changes the quantity they demand?

Question 13 options:

1)	when supply changes.

2)	when product quality changes.

3)	when marketing changes.

4)	when price changes.

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Question 14 (1 point)

Assume Mary consumes only tea and pastries. A cup of tea costs 5 euros and a pastry costs 8 euros. Her weekly income is 450 euros. Mary always drinks 2 cups of tea for every pastry she consumes. What is Maryâs optimal weekly consumption bundle?

Question 14 options:

1)	25 cups of tea and 50 pastries.

2)	50 cups of tea and 25 pastries.

3)	58 cups of tea and 20 pastries.

4)	60 cups of tea and 30 pastries.

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Question 15 (1 point)

When is producer surplus a positive value?

Question 15 options:

1)	the price the producer is willing to charge equals the market price.

2)	there is no tax applied to the good.

3)	the price the producer is willing to charge is less than the market price.

4)	the price the producer is willing to charge is greater than the market price.

ECON 100A Lecture Notes - Lecture 26: Tangent, Indifference Curve

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