Economics 2150A/B Study Guide - Midterm Guide: Inferior Good, Normal Good, Engel Curve

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ECON 2150A/B Full Course Notes

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File: ch05, chapter 5: the theory of demand. If a consumer"s preferences for two goods, say food and clothing, are such that as income decreases, consumption of food increases but consumption of clothing decreases, we can say that. Lo 1 explain how a consumer"s demand for a good depends on the prices of all goods and on income. income-consumption curve. price-consumption curve. demand curve. A curve that represents the consumer"s willingness to pay is the consumer"s. The price of all goods other than the good of interest. The engel curve for a normal good is upward-sloping. The engel curve for an inferior good is downward-sloping. A graph that plots the consumer"s level of consumption of a good against the consumer"s income is called a(n) price-consumption curve. A negatively-sloped engel curve implies a(n) inferior good. normal good. Suppose when the consumer"s income rises by 100%, the consumer"s consumption of good only increases 1%.

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Chaka consumes two goods x and y. Suppose that her (downward-sloping) demand curve for x shifts outward/upward (away from the origin). Consider, one by one, whether this shift might have been caused by the following changes, explaining your answers. Assume that nothing else changes besides the factors listed; for example, in (b) you should assume that only nominal income (I) changes and that Px and Py do not change.

(a) An decrease in Py, if x and y are substitutes. (b) An increase in nominal income I, if x is an inferior good. (c) A doubling in both Px and Py. (d) A decrease in Px.

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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)The law of demand states that as the price of a good rise, _____.

A. buyers purchase more of the good because the price of a substitute has risen.

B. buyers purchase less of the good because their real income decreases with an increase in price.

C. buyers purchase more of the good because they expect prices to be even higher in the future

D. buyers purchase less of the good because they expect prices to fall in the future.

2) A movement along a demand curve can be attributed to a change in:

A. the quantity demanded of a good.

B. the demand for a good.

C. the substitution effect of consuming a good.

D. the opportunity cost of producing a good.

3) If we say that demand for a good has increased, we mean that there has been:

A. a leftward shift of the demand curve.

B. a rightward shift of the demand curve.

C. a leftward movement along the demand curve.

D. a rightward movement along the demand curve.

4) Which of the following will cause the demand curve for a normal good to shift to the right?

A. An increase in the price of a complementary good.

B. A decrease in income.

C. A decrease in the price of the good.

D. An increase in the price of a substitute good.

5)Which of the following best defines supply?

A. The amount of a good that is produced at the least possible cost, other things constant

B. The amount of a good that producers are willing and able to sell at each possible price, other things constant.

C. The amount of a good that consumers want to buy at different income levels

D. The amount of a good that producers want to sell at a fixed price

6)The market supply curve of a particular product indicates the total quantities:

A. that are actually sold during a given time period.

B. that sellers are willing to offer for sale at a fixed price.

C. that buyers are willing to purchase at alternative prices.

D. that sellers are willing and able to offer at alternative prices.

7)When quantity demanded of a good exceeds the quantity supplied at the prevailing market price, _____.

A. the demand curve shifts rightward until the surplus is eliminated

B. the market is in equilibrium.

C. the price of the good will tend to increase.

D. the price of the good will decrease

8)A shortage of textbooks is most likely to cause:

A. an increase in the price of textbooks.

B. a decrease in the supply of textbooks.

C. a decrease in the price of paper.

D. an increase in the cost of printing.

9)The most important characteristic of the equilibrium price is that it:

A. maximizes the quantity demanded.

B. clears the market, leaving neither a surplus nor a shortage.

C. minimizes the quantity demanded.

D. guarantees that producers earn the profit.

10)If both demand and supply increases in a market that is initially in equilibrium, the price will:

A. increase only if demand increases more than supply.

B. increase only if supply increases more than demand.

C. remain unchanged while quantity will increase.

D. remain unchanged while quantity will decrease.

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Economics 2150A/B Study Guide - Midterm Guide: Inferior Good, Normal Good, Engel Curve

ECON 2150A/B Full Course Notes

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