MGEA02H3 Study Guide - Economic Surplus, Demand Curve, Utility

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lemondinosaur451

4 Jun 2013

School

UTSC

Department

Economics for Management Studies

Course

MGEA02H3

Professor

all

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MGEA02H3 Full Course Notes

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Knowledge summary: total utility is the amount of joy we obtain from consuming a product. Total utility (tu) is a function of the units we consume (q), i. e. , tu = f(q: marginal utility (mu) Defined to be the utility we obtain from consuming a little bit more. It is the first derivative of tu regarding q. Marginal utility is diminishing, i. e. , the joy we obtain from consuming the first unit is greater than the joy we get from the second unit, etc: to obtain demand function: We want to maximize the net benefit obtained from consuming product, i. e. we want to maximize the consumer surplus (cs) Cs = tu total expenditure = tu te. To maximize cs, we can set the first derivative of cs regarding q to be zero. In this way, we can calculate the q to consume in order to maximize the cs for a particular p. Mathematically, dcs/ dq = 0 dtu/dq dte/dq = 0.

Related Questions

1. Economists use ____________ as a measure of the relative level of satisfaction when someone consumes a good or service.

2. Sue likes brownies. However, Sue notices that the more brownies she eats the less satisfaction she receives from each extra brownie. We can say that Sue is experiencing ___________________ from each extra brownie.

sugar sickness

total utility

diminishing marginal utility

increasing marginal utility

3. When total utility is maximized, the marginal utility will be

4. Consider Dirk and Lee. They are both eating pizza. Which of the following statements is true regarding their satisfaction and utility?

Dirk and Lee both receive 10 utils from eating pizza.

Dirk and Lee both receive the same level of satisfaction from eating pizza.

Dirk gets more twice as much satisfaction as Lee from eating pizza.

It is difficult to determine because the utility is subjective.

5. For many products, the total utility curve is

strictly increasing because of increasing marginal utility.

strictly decreasing because of diminishing marginal utility.

increasing initially because of increasing marginal utility, but eventually decreases.

increasing initially at a decreasing rate because of diminishing marginal utility but eventually decreases.

6. When consumers get the biggest bang for the buck, we say they

used the loudest gun in hunting season.

reached a consumer optimum.

minimized consumer satisfaction.

maximized marginal utility.

7. By choosing to consume at the consumer optimum, consumers will

maximize their total utility.

minimize their total utility.

maximize the amount they spend on each good.

minimize the amount they spend on each good.

8. A consumer is in equilibrium when consuming two goods when which of the following holds?

MU_a/ P_a = MU_b/ P_b

MU_a/ P_h =MU_b/ P_a

P_a/ MU_a = P_b/ MU_b

MU_a x P_a = MU_bxP_b

9. If the marginal utility of good 1 is 15 and its price is $3, and the marginal utility of good 2 is 12, and its price is $4, then the consumer

has achieved a consumer optimum.

should increase his or her consumption of good 1.

should increase his or her consumption of good 2.

should decrease his or her consumption of good 1.

10.Suppose the price of an iPod decrease and the price of HD TVs remains the same; what noticeable effect(s) occur(s)?

the substitution effect only

the real-income effect only

the substitution effect and real-income effect, if there is a noticeable change in purchasing power

the substitution effect and real-income effect, if there isnât a noticeable change in purchasing power

11. The ______________ paradox was described by Adam Smith in 1776.

12. What is the key to solving the diamond-water paradox?

more water and fewer diamonds

marginal utility

total utility

consumer demand

13. When solving the diamond-water paradox we notice that the marginal utility of

diamonds are equal to the marginal utility of water.

diamonds are greater than the marginal utility of water.

diamonds are less than the marginal utility of water.

water is equal to its price, and therefore lower than the marginal utility of diamonds.

14. The consumer surplus for water is

greater than that for diamonds because water is nonessential.

greater than that for diamonds because water is essential.

less than that for diamonds because water is nonessential.

less than that for diamonds because water is essential.

15. Suppose a consumer consumes only diamonds and water, and the price of diamonds increases. All else being equal, a consumerâs marginal utility for diamonds

decreases and the marginal utility for water stays the same.

increases and the marginal utility for water decreases.

decreases and the marginal utility for water increases.

increases and the marginal utility for water stays the same.

tansnake161

1. Suppose that the total utility from consuming one unit of good X is 54 utils, the total utility of two units of good X is 74 utils, and the total utility of three units of good X is 84 utils. The marginal utility of the third unit is

a.70.67 utils.

b.10 utils.

c.12.25 utils.

d.20 utils.

2. If income rises, the budget constraint

a. Moves outward away from the origin

b. Does not move

c. Moves inward toward the origin

d. Moves farther down the vertical axis

3. Economists assume that the goal of consumers is to maximize total utility.

true/false

4. The budget constraint cuts the horizontal axis at 12 units of good X and it cuts the vertical axis at 20 units of good Y. If the price of good X is $20 and the price of good Y is $12, then what does income equal?

a. $200

b. $240

c. $520

d. $280

e. not enough information to answer this question

5. Consumer equilibrium exists when an individual

a. can be made better off by buying more of a normal good and less of an inferior good.

b. is receiving the same total utility from each of the goods he or she purchases.

c. is receiving the same marginal utility from each of the goods he or she purchases.

d. has the same MU/P ratio for each of the goods he or she purchases.

e. none of the above

6. Suppose you are eating buffalo wings at a local happy hour. The total utils from doing so after the fourth, fifth, sixth, and seventh wings are 30, 50, 65, 72, respectively. In this situation we have __________ marginal utility, which is generally __________ in the analysis of consumer choice.

a. diminishing; not assumed

b. increasing; assumed

c. diminishing; assumed

d. increasing; not assumed

7. Which of the following best describes an interpersonal utility comparison?

a. Usually, Smith seems a lot happier than Jones.

b. Smith gets more utility from working on his computer than Jones gets from working on his computer.

c. Smith usually eats more in a day than Jones eats in a day.

d. ones likes computers produced by Dell Computer Corporation and Smith likes computers produced by Apple Computer Inc

e. Smith got less utility from eating the 30th cookie than eating the 29th cookie, and the same holds for Jones.

8. We would expect the total utility of water to be high but its marginal utility to be low. Why?

a. Because we need water to live and there is so much of it.

b. Because we need water to live and there is very little of it.

c. Because water is a fluid and we don't need fluids to live as much as we need food

d. Because water's price is low.

9.The marginal utility curve for units 6 through 8 of good Z lies below the horizontal axis. What does this imply must be true about the total utility curve for units 6 through 8 of good Z?

a. That portion of good Zâs total utility curve must also lie below the horizontal axis.

b. That portion of good Zâs total utility curve must be upward sloping.

c. That portion of good Zâs total utility curve must be horizontal.

d. That portion of good Zâs total utility curve must be downward sloping.

10. Research presented in the text shows that people are more concerned with their absolute income position in a group than their relative income position in the group.

true/false

1. Most people would prefer to drive a luxury car that has all the options, but more people buy less expensive cars even though they could afford the luxury car because:

A. luxury cars cost a lot more than non-luxury cars.

B. the total utility of less expensive cars is greater than that of luxury cars.

C. car buyers are irrational.

D. the marginal utility per dollar spent on the less expensive car is higher than that spent on luxury cars.

2. The labor market is considered as one of the more important markets in an economy because

A. most people typically earn the bulk of their income from wages and salaries.

B. the usual market forces do not hold in the labor market.

C. the labor market does not reach an equilibrium.

D. most people are concerned that wages determined in the labor market are unfair.

3. Table 17-1
Quantity of Labor Output (units)
1 80
2 170
3 240
4 300
5 350
6 390
7 420

Refer to Table 17-1. The marginal product of the fourth unit of labor is

A. 300.

B. 75.

C. 60.

D. 15.

4. Carolyn spends her income on popular magazines and music CDs. If the price of a CD is four times the price of a magazine and if Carolyn is maximizing her utility, she buys:

A. both goods until the marginal utility of the last CD purchased is four times the marginal utility of the last magazine purchased.

B. both goods until the marginal utility of the last magazine purchased is four times the marginal utility of the last CD purchased.

C. four times as many magazines as CDs.

D. four times as many CDs as magazines.

5. Marginal utility is the:

A. average satisfaction received from consuming a product.

B. total satisfaction received from consuming a given number of units of a product.

C. extra satisfaction received from consuming one more unit of a product.

D. satisfaction achieved when a consumer has had enough of a product.

6. What is behavioral economics?

A. the study of how people behave in the face of scarcity

B. the study of how people make decisions at the margin

C. the study of situations in which people act in ways that are not economically rational

D. the study of how people make wealth-maximizing decisions

7. Suppose a competitive firm is paying a wage of $12 an hour and sells its product at $3 per unit. Assume that labor is the only input. If hiring another worker would increase output by three units per hour, then to maximize profits the firm should:

A. not hire an additional worker.

B. hire another worker.

C. not change the number of workers it currently hires.

D. There is not enough information to answer the question.

8. Consumers have to make tradeoffs in deciding what to consume because:

A. they are limited by a budget constraint.

B. there are not enough of all goods produced.

C. not all goods give them the same amount of satisfaction.

D. the prices of goods vary.

9. Table 17-1
Quantity of Labor Output (units)
1 80
2 170
3 240
4 300
5 350
6 390
7 420

Refer to Table 17-1. If the output price is $3, what is the marginal revenue product of the fifth unit of labor?

A. $1,050

B. $360

C. $210

D. $150

10. At low wages, the labor supply curve for most people slopes upward because:

A. as wages increase income also increases unless hours worked decrease.

B. the demand for labor is perfectly elastic at low wages.

C. as wages increase the opportunity cost of leisure increases.

D. the supply of labor is perfectly inelastic at low wages.

11. A negative externality exists if:

A. the marginal social cost of producing a good or service exceeds the private cost.

B. the marginal private cost of producing a good or service exceeds the social cost.

C. there are quantity controls in a market.

D. there are price controls in a market.

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MGEA02H3 Study Guide - Economic Surplus, Demand Curve, Utility

MGEA02H3 Full Course Notes

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