ECO105Y1 Chapter Notes - Chapter 3: Sunk Costs, Marginal Cost, Marginal Utility

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orchidcamel574

9 Mar 2016

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Eco105 economics: chapter 3: show me the money. Marginal cost: addiional opportunity cost of increasing quanity supplied, and changes with. T e x t b o o k n o t e s circumstances: ulimately opportunity costs, ex) you are supplying ime, and marginal cost of your ime increases as you increase quanity of hours supplied. Diferences between supply choices and smart demand choices: supply. Marginal cost increases as you supply more. Marginal beneit = $ (wages); marginal cost = opportunity cost of ime: demand. Marginal beneit decreases as you buy more: supply & demand. Marginal beneit is saisfacion you get; marginal cost is measured in $ (price you. Sunk costs: past expenses that cannot be recovered pay: sunk costs are the same no mater what no inluence on smart choices, ex) signing a year"s lease. If the price of a product/service rises, quanity supplied increases.

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1) For each of the following goods, state whether it is a normal good, a luxury, a necessity, or an inferior good. (Sugar)<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

a) Inferior. Increases in income lead to less use of sugar. However, rich people do not use much less sugar than poor people, so elasticity is positive but greater than 1.

b) Inferior. Increases in income lead to slightly more use of sugar. However, rich people do not use much more sugar than poor people, so elasticity is positive but less than 1.

c) Normal and necessity. Increases in income lead to slightly more use of sugar. However, rich people do not use much more sugar than poor people, so elasticity is positive and greater than 1.

d) Normal and necessity. Increases in income lead to slightly more use of sugar. However, rich people do not use much more sugar than poor people, so elasticity is positive but less than 1.

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2) A perfectly competitive firm sells its good for $24. If marginal cost is three times the quantity produced, how much does the firm produce? Why?

a) Assuming perfect competition, the firm is producing where MR = MC. If the price is $24, and MC is three times the quantity, it is producing 72 units.

b) Assuming perfect competition, the firm is producing where MC is twice MR. If the price is $24, then MC = $48. This means that the firm is producing 12 units.

c) Assuming perfect competition, we do not have enough information to determine how much the firm is producing.

d) Assuming perfect competition, the firm is producing where MR = MC=P. Since price is $24, MR also is $24. If MC is three times the quantity, it is producing 8 units

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3) State the law of supply.

a) Quantity supplied rises as price increases, other things constant. Quantity supplied falls as price decreases, other things constant.

b) Supply increases as price falls. Supply decreases as price rises.

c) Quantity supplied rises as price falls, other things constant. Quantity supplied falls as price increases, other things constant.

d) Supply increases as price increases. Supply decreases as price decreases

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4) If marginal cost is increasing, what do we know about average cost?

a) If marginal cost is increasing, average costs could be rising, falling, or constant. The direction of average costs depends upon whether marginal cost is higher or lower than average cost.

b) If marginal cost is increasing, average costs are rising. As the cost of the next item produced is rising, the average cost of all the items produced must also be rising.

c) If marginal cost is increasing, average costs are falling. Marginal costs only increase at very high levels of production. When items are mass-produced (because of economies of scale) their average costs always fall, even when marginal costs begin to increase.

d) Average cost is constant and always lower than marginal cost because of the law of decreasing marginal productivity. As more items are produced marginal costs increase (the same as productivity decreasing), but average costs remain constant because the total number of items produced is also increasing

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5) (The president of Lebanon Valley College proposed the following tuition program: provide a 50 percent tuition reduction for those graduating in the top 10 percent of their high school class, 33 percent reduction for those in the top 20 percent, and 25 percent reduction for those in the top 30 percent. All scholarship recipients were also required to maintain a minimum GPA. The comptroller estimated that the elasticity of demand for these students was greater than 1.)

Why did the program distinguish among top-performing students?

A) The program distinguished among top students because they were the least likely to respond to scholarships, keeping expenses related to scholarships down.

B) The program distinguished among top students because the top students demanded greater scholarships. The only way to achieve equilibrium was to supply more scholarships to these students.

C) The program distinguished among top students because their elasticities likely differed. The top 10 percent were likely being offered scholarships at other academic institutions, giving them greater choices, which made their elasticities greater.

D) The program distinguished among top students because their elasticities likely differed. The top 10 percent were likely being offered scholarships at other academic institutions, giving them greater choices, which made their elasticities lower.

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6) Say that equilibrium price fell and quantity remained constant. What would you say was the most likely cause?

a) The supply curve shifted left and the demand curve shifted left.

b) The supply curve shifted right and the demand curve shifted right.

c) The supply curve shifted right and the demand curve shifted left.

d) The supply curve shifted left and the demand curve shifted right.

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7) A firm has just decreased its price by 10 percent over last year's price, and it found that quantity sold decreased 20%. What The firm comes to you and wants to know its price elasticity of demand ?

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8) Name two advantages of the behavioral model.

Select all that apply.

a) They better match observed behavior.

b) Each model depends on a specific context and they are not easily generalized to other contexts.

c) Broader building blocks free researchers to look for more patterns in the data.

d) Irrational behavior results in complicated models that are often difficult to solve.

e) They assume people are rational, which better matches reality.

f) All economists agree the assumptions of the behavioral model are realistic.

viridianweasel299

Suppose that, instead of taking this test, you could either have worked and earned income or partied and had a pleasurable time. Your opportunity cost of taking the test is the

	a.	forgone working or partying, depending on which was your next best choice.
	b.	forgone work.
	c.	forgone working and partying.
	d.	test because you are taking it.

1 points

QUESTION 2

A trend is

	a.	a measure of closeness on a scatter diagram.
	b.	a general tendency for a variable to rise or fall.
	c.	the maximum value of a variable.
	d.	the difference between the maximum value of a variable and the minimum value of the variable.

1 points

QUESTION 3

A time-series graph measures

	a.	time on the y-axis and the variable or variables in which we are interested on the x-axis.
	b.	time on the x-axis and the variable or variables in which we are interested on the y-axis.
	c.	the value of one variable against the value of another variable.
	d.	the value of an economic variable for different groups in a population at a point in time.

1 points

QUESTION 4

Canada has nationalized health care, so that everyone, regardless of their ability to pay, has some access to health care. Based on this observation, Canada has decided that "everyone, regardless of their ability to pay" is the answer to what microeconomic question?

	a.	Why will we offer health care?
	b.	How will health care be produced?
	c.	For whom will health care be produced?
	d.	What type of health care will be produced and in what quantity?

1 points

QUESTION 5

As a shoe factory adds more workers, shoe production grows, reaches a maximum, and then shrinks. In a diagram that has the number of workers on the horizontal axis and the number of shoes on the vertical axis, the relationship between the number of workers and the number of shoes starts as ________ and then, after the maximum point, is ________.

	a.	positive; negative
	b.	negative; positive
	c.	linear; negative
	d.	positive; linear

1 points

QUESTION 6

Microeconomics includes the study of the

	a.	choices made by individuals and businesses.
	b.	recessions and inflation in the global economy.
	c.	aggregate effects on the national economy.
	d.	reasons why the government changes interest rates.

1 points

QUESTION 7

When Fresh Express Salads decides to mechanically pick all of its lettuce, it directly answers the ________ question.

	a.	when
	b.	for whom
	c.	how
	d.	what

1 points

QUESTION 8

Proponents of cuts in income tax rates argue that when income tax rates are cut, workers have an incentive to increase their work hours. This argument is based on the assumption that

	a.	the opportunity cost of working is negative.
	b.	the marginal cost of each additional work hour is not important to most workers.
	c.	workers are irrational.
	d.	workers make decisions based on the marginal benefit of each hour worked compared to the marginal cost of work.

1 points

QUESTION 9

A choice made by comparing all relevant alternatives systematically and incrementally is

	a.	an opportunity cost.
	b.	a benefit.
	c.	a sunk cost.
	d.	a choice on the margin.

1 points

QUESTION 10

A normative statement

i. can be tested as to whether it is true or false.

ii. is considered negative.

iii. depends on a person's values.

	a.	i, ii, and iii
	b.	iii only
	c.	i and iii
	d.	ii and iii

1 points

QUESTION 11

Normative statements

i. describe how the world is.

ii. describe how the world ought to be.

iii. depend on people's values and cannot be tested.

	a.	iii only.
	b.	i only.
	c.	ii and iii.
	d.	ii only.

1 points

QUESTION 12

In order to determine whether to major in economics, a rational individual compares the ________ of the decision.

	a.	positive benefits and normative costs
	b.	normative benefits and positive costs
	c.	marginal benefit and marginal cost
	d.	opportunity cost and the sunk cost

1 points

QUESTION 13

If x increases whenever y decreases, then x and y are

	a.	positively related.
	b.	negatively related.
	c.	not related.
	d.	related but whether positively or negatively related depends on whether the x variable or the y variable is plotted on the vertical axis.

1 points

QUESTION 14

Rational choice

	a.	is what you must give up get what you want.
	b.	is made by comparing different incentives.
	c.	making the choice.
	d.	provides the answer to only the "how" question.

1 points

QUESTION 15

Scarcity results from the fact that

	a.	choices made in self-interest rare not always in the social interest.
	b.	not all goals are desirable.
	c.	people's wants exceed the resources available to satisfy them
	d.	we cannot answer the major economic questions.

1 points

QUESTION 16

When Delta decides to quit flying to Lithuania, it directly answers the ________ question.

	a.	what
	b.	why
	c.	for whom
	d.	how

1 points

QUESTION 17

A normative statement

	a.	says what is currently believed about the way the world operates.
	b.	depends on someone's values.
	c.	cannot use the word "should."
	d.	must be tested to determine if it is correct.

1 points

QUESTION 18

Which of the following statements best describes the study of economics? Economics studies how

	a.	to organize production so that scarcity does not occur.
	b.	to create incentives so that scarcity does not exist.
	c.	firms make profits.
	d.	we make choices in the face of scarcity.

1 points

QUESTION 19

Which of the following best defines economics?

	a.	Economics teaches how to limit our wants.
	b.	Economics is concerned with prices and quantities of goods and services, both at the individual level and at the industry level.
	c.	Economics helps you earn as much money as possible.
	d.	Economics studies how to choose the best alternative when coping with scarcity.

1 points

QUESTION 20

In economics, cost is ________, and benefit is ________.

	a.	the amount of money that you pay for something; the amount of money that someone else is willing to pay you
	b.	what you are willing to pay on the margin; what the government pays you when you are unemployed or retired
	c.	what you must give up to get something; what you are willing to give up to get it
	d.	the amount of money that you pay on the margin; the amount of money that you receive on the margin

1 points

QUESTION 21

If Jessie studies economics for two hours instead of going to the movies with her friends, then

	a.	the opportunity cost of studying is the missed movie.
	b.	Jessie is ignoring a sunk cost
	c.	Jessie is not responding to any incentives.
	d.	Jesse definitely is making a rational choice.

1 points

QUESTION 22

Going skiing will cost Adam $80 a day. He also loses $40 per day in wages because he has to take time off from work. Adam still decides to go skiing.

	a.	The $80 price of skiing is a sunk cost and so did not affect Adam's decision.
	b.	He loses a total of $120 per day, so his decision is irrational.
	c.	His decision is rational if Adam's marginal benefit of spending a day skiing is greater than his marginal cost.
	d.	Adam's lost $40 per day in wages is a sunk cost and so did not affect his decision.

1 points

QUESTION 23

If a curve falls and then rises, it

	a.	has a maximum.
	b.	has a linear relationship.
	c.	has a minimum.
	d.	has a constant slope relationship.

1 points

QUESTION 24

In 2003, Michael Jordan decided to retire from professional basketball. Which of the following was an opportunity cost of his decision?

	a.	the avoidance of pain and injury from playing one more year
	b.	the time he could spend with his family while retired
	c.	the lost salary from playing one more year
	d.	the value of new employment opportunities that would await him

1 points

QUESTION 25

Which of the following statements is a normative statement?

	a.	Military spending as a percent of government spending decreased by 5 percent in the 1990s.
	b.	Every American household should have health care insurance coverage.
	c.	Welfare reform has decreased the amount the government spends on welfare.
	d.	The price of computers fell last year.

greencat417

1. You purchase a pizza oven that is expected to last 10 years for $15,000. How do you account for the economic cost of the oven?

A. The cost is the price of the oven minus any revenue made selling pizzas made in the oven.

B. Calculate the value of renting the oven to someone else and use that as your cost.

C. Amortize the cost over the 10-year life of the oven, resulting in a cost of $1,500 per year.

D. Expense the oven, taking a write-off for the entire price in the first year.

2. If a firm buys a specialized metal stamping machine that will last 4 years for $125,000 and cannot resell it, the sunk cost is

A. $0.

B. $93,750.

C. $31,250.

D. $125,000.

3. Which of the following is NOT a form of outsourcing?

A. paying your son to mow the lawn.

B. hiring an accountant to do your taxes.

C. taking a taxi to the airport.

D. replacing the windshield wipers on your car.

4. Why do many people choose to not read the manuals included with their new computer?

A. They perceive that learning by doing is more enjoyable than learning by reading.

B. They perceive that learning by doing decreases costs faster than learning by reading.

C. They perceive that learning by reading is not sophisticated.

D. They perceive that learning by doing is better than learning by reading.

5. When you have diminishing marginal returns to labor

A. variable costs fall as more output is produced.

B. variable costs remain constant as more output is produced.

C. fixed costs rise as more output is produced because you have to buy more equipment to compensate.

D. variable costs rise as more output is produced.

6. A durable good is a product that

A. is usable over a long period of time.

B. holds up well under abuse.

C. has had the same design over a long period of time.

D. is purchased only once.

7. Isocost lines

A. represents the combinations of inputs that have the same total cost.

B. represents the combinations of inputs that have the same marginal cost.

C. represent supply and demand for inputs at a given cost.

D. are the inverse of the isoquant lines.

8. Why might a police officer not pull over someone speeding two miles over the speed limit?

A. The opportunity costs of stopping the driver are too low.

B. The explicit costs of stopping the driver over are too high.

C. The opportunity costs of stopping the driver are too high.

D. The explicit costs of stopping the driver are too low.

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ECO105Y1 Chapter Notes - Chapter 3: Sunk Costs, Marginal Cost, Marginal Utility

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