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ECON 101 Lecture Notes - Lecture 3: Celery, Economic Equilibrium, Lemonade Stand

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greencattle509
13 Feb 2017
School
SDSU
Department
Economics
Course
ECON 101
Professor
baker

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Document Summary

Models of supply and demand are foundation of economic theory. Framework for understanding marketplace events and outcomes. Markets: allow buyers/sellers to transact with one another. Demand: evaluates how consumers value goods in different settings. Prices: contain wealth of information for both buyers and sellers. Allow shoppers to compare relative cost of different goods. Rising prices encourage firms to supply more of product. Price system: market economy of buyers and sellers and prices. Highest value that consumer believes good/service is worth. Consumers whose willingness-to-pay is at least as much as actual price. Demand refers to products that consumers will buy during a certain period. Law of demand: consumers will buy more of product as its price falls. As price goes up, demand goes down. As price goes down, demand goes up. Demand curve: shows relationship between price of good and quantity demanded. Downward sloping line indicates these 2 variables are inversely related.

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Related Questions

1 Other things remaining the same, a left shift in the supply curve will lead to:

A. a decrease in the equilibrium price and the equilibrium quantity.

B. an increase in the equilibrium price and the equilibrium quantity.

C. an increase in the equilibrium price and a decrease in the equilibrium quantity.

D. a decrease in the equilibrium price and an increase in the equilibrium quantity.

2 Two goods are said to be complements when a fall in the price of one good:

A. leads to a fall in price of the other good.

B. leads to a left shift in the demand for the other good.

C. leads to a right shift in the demand for the other good.

D. doesn't affect the demand for the other good.

3 In a competitive free market:

A. all exchanges take place involuntarily.

B. there is no provision for the protection of property rights.

C. there is only one seller and many buyers.

D. the government does not impose price controls.

4 Which of the following correctly explains the role of economic agents in a free market?

A. Economic agents allocate goods to those buyers who value the goods the most.

B. Economic agents allocate goods to those buyers who need the goods the most.

C. Economic agents set production quotas for sellers in the market.

D. Economic agents set prices according to the production cost of each good.

5 Which of the following was an effect of the price ceiling placed on gasoline in the U.S. in the 1970s?

A. Gas stations ran out of gas as the quantity of gas demanded exceeded the quantity supplied.

B. Car owners started buying luxury cars that were less fuel-efficient as the price of gas was very low.

C. Those who valued gas the most were able to buy gas under the price ceiling.

D. The inventory of unsold gas increased and gas stations incurred losses.

6 Willingness to accept is:

A. the highest price that a producer is willing to receive to sell an extra unit of a good.

B. always higher than the marginal cost of production.

C. always lower than the marginal cost of production.

D. the lowest price that a producer is willing to receive to sell an extra unit of a good.

7 Assume that the economy is in a recession and consumers are expecting a fall in their income levels. This will cause a(n):

A. right shift in the market demand for all goods.

B. left shift in the market demand for all goods.

C. an increase in the total quantity demanded of all goods.

D. decrease in the total quantity demanded of all goods.

8 Which of the following factors is expected to cause the demand curve for coffee to shift to the right?

A. A higher personal tax on the income of all consumers

B. An increase in the supply of coffee due to better weather

C. A higher tax on the sale of tea, a substitute for coffee

D. A fall in the manufacturing cost of coffee

9 If the demand and supply curves for a commodity shift to the right and the shift in demand is greater than the shift in supply, then in comparison to the initial equilibrium, the new equilibrium will be characterized by:

A. the same price and quantity.

B. a lower price and quantity.

C. a higher price and a lower quantity.

D. a higher price and quantity.

10 Which of the following statements correctly describes a perfectly competitive market?

A. Haggling and bargaining are commonly observed in a perfectly competitive market.

B. Buyers in a perfectly competitive market pay different prices according to their individual demand.

C. In a perfectly competitive market, individual sellers and buyers can influence the market price.

D. All participants in a perfectly competitive market are price-takers.

1. Other things remaining the same, a left shift in the supply curve will lead to:

A. a decrease in the equilibrium price and the equilibrium quantity.

B. an increase in the equilibrium price and the equilibrium quantity.

C. an increase in the equilibrium price and a decrease in the equilibrium quantity.

D. a decrease in the equilibrium price and an increase in the equilibrium quantity.

2. Two goods are said to be complements when a fall in the price of one good:

A. leads to a fall in the price of the other good.

B. leads to a left shift in the demand for the other good.

C. leads to a right shift in the demand for the other good.

D. doesn't affect the demand for the other good.

3. In a competitive free market:

A. all exchanges take place involuntarily.

B. there is no provision for the protection of property rights.

C. there is only one seller and many buyers.

D. the government does not impose price controls.

4. Which of the following correctly explains the role of economic agents in a free market?

A. Economic agents allocate goods to those buyers who value the goods the most.

B. Economic agents allocate goods to those buyers who need the goods the most.

C. Economic agents set production quotas for sellers in the market.

D. Economic agents set prices according to the production cost of each good.

5. Which of the following was an effect of the price ceiling placed on gasoline in the U.S. in the 1970s?

A. Gas stations ran out of gas as the quantity of gas demanded exceeded the quantity supplied.

B. Car owners started buying luxury cars that were less fuel-efficient as the price of gas was very low.

C. Those who valued gas the most were able to buy gas under the price ceiling.

D. The inventory of unsold gas increased and gas stations incurred losses.

6. Willingness to accept is:

A. the highest price that a producer is willing to receive to sell an extra unit of a good.

B. always higher than the marginal cost of production.

C. always lower than the marginal cost of production.

D. the lowest price that a producer is willing to receive to sell an extra unit of a good.

7. Assume that the economy is in a recession and consumers are expecting a fall in their income levels. This will cause a(n):

A. right shift in the market demand for all goods.

B. left shift in the market demand for all goods.

C. increase in the total quantity demanded of all goods.

D. decrease in the total quantity demanded of all goods.

8. Which of the following factors is expected to cause the demand curve for coffee to shift to the right?

A. A higher personal tax on the income of all consumers

B. An increase in the supply of coffee due to better weather

C. A higher tax on the sale of tea, a substitute for coffee

D. A fall in the manufacturing cost of coffee

9. If the demand and supply curves for a commodity shift to the right and the shift in demand is greater than the shift in supply, then in comparison to the initial equilibrium, the new equilibrium will be characterized by:

A. the same price and quantity.

B. a lower price and quantity.

C. a higher price and a lower quantity.

D. a higher price and quantity.

10. Which of the following statements correctly describes a perfectly competitive market?

A. Haggling and bargaining are commonly observed in a perfectly competitive market.

B. Buyers in a perfectly competitive market pay different prices according to their individual demand.

C. In a perfectly competitive market, individual sellers and buyers can influence the market price.

D.All participants in a perfectly competitive market are price-takers.

Considering the demand side of a market for a good, it is reasonable to expect that:
i. demand curves for a given good are identical between consumers
ii. demand curves for a given good differ between consumers
iii. an individual has identical demand curves for different goods
iv. an individual has different demand curves for different goods

i
ii
iii
iv
i and iii
ii and iv

Suppose the market demand curve for a good is represented by the linear equation Q = 60 - 0.75P. If the market price were to increase from P = $20 to P = $40, then holding all other factors constant:

the quantity demanded would decrease by 10 units and total expenditures on the good would decrease by $400
the quantity demanded would decrease by 15 units and total expenditures on the good would increase by $300
the quantity demanded would decrease by 30 units and total expenditures on the good would increase by $1200
the quantity demanded would increase by 20 units and total expenditures on the good would decrease by $800
the quantity demanded would increase by 10 units and total expenditures on the good would increase by $100
the quantity demanded would increase by 25 units and total expenditures on the good would increase by $1000

A perfectly competitive firms supply curve for a good identifies the:
i. minimum quantity supplied at each price, holding all other factors constant
ii. firms minimum willingness to accept for each incremental unit of the good (e.g., the first unit, second unit, etc.), holding all other factors constant
iii. maximum quantity supplied at each price, holding all other factors constant
iv. firms maximum willingness to accept for each incremental unit of the good (e.g., the first unit, second unit, etc.), holding all other factors constant

i and ii
i and iv
ii and iii
iii and iv

Considering the supply side of a market for a good, if a firms supply curve were vertical, then:

the law of supply holds, and quantity supplied is completely insensitive to changes in price
the law of supply holds, and quantity supplied is highly sensitive to changes in price
the law of supply fails to hold, and quantity supplied is completely insensitive to changes in price
the law of supply fails to hold, and quantity supplied is highly sensitive to changes in price
none of the above

The determinants of supply are:
i. factors other than price that will affect the quantity of a good or service a firm is willing and able to purchase
ii. factors that affect a producers maximum willingness-to-accept to produce various quantities of a good
iii. factors that affect a producers minimum willingness-to-accept to produce various quantities of a good

i
ii
iii
i and ii
i and iii

The market supply curve for a good is derived by:
i. horizontally summing the supply curves of the individual firms in the market
ii. vertically summing the supply curves of the individual firms in the market
iii. summing the quantity supplied by each firm at a given price and then repeating this over the range of prices

i
ii
iii
i and ii
i and iii

If the level of technology used in the production of a good improves, and assuming the quality of the good does not change, then:
i. more output may be obtained with a given amount of inputs compared to before the technological improvement
ii. a given amount of output may be obtained with fewer inputs compared to before the technological improvement
iii. the firm will increase its use of other inputs, such as the number of workers it employs
iv. market demand for the good will increase

i
ii
iii
iv
i and ii
i, ii, and iii
i, ii, and iv
i, ii, iii, and iv

Considering the market for gasoline, which of the following would result in an increase in market supply?
i. a decrease in the price of gasoline
ii. an improvement in oil extraction and refining technologies
iii. an increase in the wage rates paid to gasoline refinery workers
iv. a decrease in the price of crude oil, a key input used to produce gasoline
v. the imposition of a federal gasoline tax aimed a decreasing the emission of greenhouse gases

i
ii
iii
iv
v
ii and iv
i, ii, and iv
i, ii, iii, and iv
i, ii, iii, iv and v

Suppose a market has two identical sellers. If each sellers supply function is given by P = 20 + Q, then the market supply function is:

P = 20 + 0.5Q
P = 20 + 2Q
P = 40 + Q
P = 40 + 2Q

From the market framework discussed in class and the readings, it may be concluded that in order for a good to be exchanged between a seller and a buyer, it must be that:

buyer maximum willingness-to-pay is greater than seller minimum willingness-to-accept
buyer maximum willingness-to-pay is greater than or equal to seller minimum willingness-to-accept
buyer minimum willingness-to-pay is greater than or equal to seller maximum willingness-to-accept
buyer minimum willingness-to-pay is greater than seller maximum willingness-to-accept

If the market demand function is given by P = 80 - 0.3Q and the market supply is given by P = 20 + 0.1Q, then the equilibrium price and quantity are:

P = $35 and Q = 150
P = $65 and Q = 150
P = $26 and Q = 60
P = $28 and Q = 80

Of concern are the affects of sustained summer droughts on the domestic supply of wheat. Noting that wheat is a primary ingredient in the production of bread and that potatoes are a substitute for bread, if the supply of wheat declines then it is reasonable to expect:

the price of wheat to fall, the supply of bread to increase, and the demand for potatoes to increase
the price of wheat to fall, the supply of bread to increase, and the demand for potatoes to decrease
the price of wheat to rise, the supply of bread to decrease, and the demand for potatoes to decrease
the price of wheat to rise, the supply of bread to decrease, and the demand for potatoes to increase
the price of wheat to rise, the supply of bread to increase, and the demand for potatoes to increase

the price of wheat to rise, the supply of bread to increase, and the demand for potatoes to decrease

Suppose a perfectly competitive market is initially in equilibrium. If market demand and supply decrease simultaneously, then equilibrium:

price will rise, but the equilibrium quantity may either rise, fall, or remain unchanged
quantity will rise, but the equilibrium price may either rise, fall, or remain unchanged
price will fall, but the equilibrium quantity may either rise, fall, or remain unchanged
quantity will fall, but the equilibrium price may either rise, fall, or remain unchanged

Considering the demand side of a market for a good, the consumer surplus derived by an individual:
i. is the difference between the maximum amount the consumer is willing to pay on each unit and the minimum prices that producers are willing to accept
ii. is the difference between the minimum amount the consumer is willing to pay on each unit and the price he/she
actually pays
iii. is the difference between the maximum amount the consumer is willing to pay on each unit and the price he/she actually pays
iv. will decrease if price increases

i
ii
iii
i and iv
ii and iv
iii and iv

Suppose the market demand for a good is described by the equation P = 120 - 2Q. If a change in market supply results in price decreasing from P0 = $80 to P1 = $70, then the resulting change in consumer surplus is:

$225
$400
$575
$625
$750