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ECON 2020 Lecture Notes - Lecture 5: Imperfect Competition, Deadweight Loss, Invisible Hand

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School
BGSU
Department
Economics
Course
ECON 2020
Professor
Schneider Andrea

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Document Summary

Consumer surplus (profit): a dollar benefit that consumers enjoy from engaging in trade: cs = value price, value is represented by the demand curve, price is represented by price equilibrium. Producer surplus (profit): a dollar benefit that producers enjoy from engaging in trade: ps = price cost. Total surplus = cs + ps: area = entire triangle on graph. Deadweight loss represents lost benefit between the consumer and producer because the government intervention has restricted trade. Invisible hand theorem: the interaction between buyers and sellers acting rationally and in their own self-interest, will be led as if by an invisible hand to promote the well-being of society as a whole (adam smith) Market failure: the interaction between buyers and sellers is leading a market to a sub-optimal level of trade in other words, there is something wrong with equilibrium quantity (quantity demanded = quantity supplied)

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Related Questions

1. Assume every buyer purchases only one unit of a product, which forms the market demand P = 650 - 20. The monopoly firm has constant marginal cost at 50 and zero fixed cost. You may find it useful to draw your diagram in part (d) as you work through this question. 1. (a) Show your step-by-step calculations of the profit-maximizing output Qs and price Ps, profits Ts, consumer surplus CSs, producer surplus PSs, and deadweight loss DWL, if this monopoly firm is the least powerful type of monopoly. (18 marks) ls 150 Ps 350 TS 45,000 CS 22,500 PS 45,000 DW Lộ 22,500 1. (b) Show your step-by-step calculations of the profit-maximizing output Qp, profits tip, consumer surplus Sp, producer surplus PSp, and deadweight loss DWLp if this monopoly firm is the most powerful type of monopoly. (15 marks) Op 300 Tp 90,000 0 PSp 90,000 DWL, 0 1. (c) Use your results to explain the trade-off between efficiency and equity when there is only one firm serving all the consumers in the market and it is not regulated by the government to protect the interests of the consumers. (7 marks) 1. (d) Plot all your results in a properly labeled diagram. (5 marks) 650 P = 350 MR D = MRP MC = AC Qs = 150 Qp = 300 = Qc Q

1 an imperfect market, individual firms

A.are always able to set the price of their product.
B.are able to influence the price of their product.
C.have no influence over the price of their product.

D.take the market price as given.

1 Which of the following is NOT characteristic of a market economy?

Significant government intervention
Little or no government intervention
Buyers and sellers motivated by self-interest
Prices determined by demand and supply

2 In a competitive market, the price of the product is

independently set by each competing seller.
set by the market leader and then copied by other sellers.
jointly set after a meeting of all sellers in the market.
set by market supply and demand.

3 Which of the following firms participates in a competitive market?

A new car manufacturer, such as Ford, Honda, Toyota, or GMC
A software producer, such as Microsoft
A corn farmer
A local electric utility company

4 In an imperfect market, individual firms

are always able to set the price of their product.
are able to influence the price of their product.
have no influence over the price of their product.
take the market price as given.

5 Which of the following firms operates as a monopoly?

A car manufacturer
A local water utility
A corn farmer
A fish vendor at a neighborhood market

6 According to the law of demand, what is the relationship between price and quantity demanded?

Direct
No relationship
Inverse

7 Refer to the following graph. The demand curve slopes downward because
Click to view graphic. (Links to an external site.)

prices and quantity demanded move in opposite directions.
prices and quantity demanded move in the same direction.
prices and quantity demanded have no relationship.
prices and quantity demanded remain unchanged.

8 A change in which of the following will cause a change in the quantity demanded of coffee?

Consumer income
The price of green tea, a substitute for coffee
The number of coffee consumers
The price of coffee

9 Suppose that burgers and fries are complements in consumption. If the price of fries increases

overall demand for burgers will increase.
overall demand for burgers will decrease.
quantity demanded for burgers will increase.
quantity demanded for burgers will decrease.

10 Suppose that Coca Cola and Pepsi are substitutes in consumption. If the price of Coca Cola decreases, then

both the equilibrium price and the quantity of Pepsi demanded will decrease.
both the equilibrium price and the quantity of Pepsi demanded will increase.
the equilibrium price of Pepsi will increase and the quantity demanded of Pepsi will decrease.
the equilibrium price of Pepsi will decrease and the quantity demanded of Pepsi will increase.

11 According to the law of supply, what is the relationship between price and quantity supplied?

Direct
No relationship
Inverse
It depends on the change in price

12 Refer to the graph below. The supply curve is _______________ driven by the law of supply.
Click to view graphic. (Links to an external site.)

Downward sloping
Upward sloping
Perfectly vertical
Perfectly horizontal

13 A change in which of the following will cause a change in the quantity supplied of coffee?

The technology or the production process of making coffee
Anticipation of a change in the price of coffee
The wages of coffee bean pickers
The price of coffee

14 Which of the following will cause a rightward shift in the supply curve for tobacco?

A fall in the number of tobacco farmers in the market
An increase in taxes on tobacco
Removal of government subsidies to tobacco farmers
An improvement in the technology used in the production of tobacco

15 Flour is a factor of production of cupcakes. How will an increase in the price of flour affect the market for cupcakes?

Overall supply will increase
Overall supply will decrease
Quantity supplied will increase
Quantity supplied will decrease

16 Refer to the following image. When a market is in equilibrium, which of the following is true?
Click to view graphic. (Links to an external site.)

Quantity supplied exceeds quantity demanded
Quantity supplied is less than quantity demanded
Quantity supplied is equal to quantity demanded
There is no relationship between quantity supplied and quantity demanded

17 Refer to the following figure. At a price of $15, this market is experiencing a(n)
Click to view graphic. (Links to an external site.)

equilibrium.
shortage.
surplus.
none of the above are true.

18 Refer to the following figure. At a price of $5, this market is experiencing
Click to view graphic. (Links to an external site.)

equilibrium.
a shortage.
a surplus.
None of the above are true.

19 Suppose pasta salad is a normal good. If the price of pasta (a major ingredient in pasta salad) increases and income also increases, the

equilibrium quantity and equilibrium price of pasta salad will increase.
equilibrium quantity of pasta salad will decrease and the equilibrium price of pasta salad may either increase or decrease.
equilibrium quantity of pasta salad may either increase or decrease and the equilibrium price of pasta salad will increase.
equilibrium quantity and equilibrium price of pasta salad will both decrease.

20. What must happen to the market price in order for a shortage to be eliminated?

Price must fall.
Price must rise.
Price must stay the same.
Price may rise or fall depending on the size of the shortage.

Question 1 If it was impossible to have a comparative advantage, there would be no gains from trade. True False 4 points

Question 2 If the price of Good X is $10 and price of Good Y is $15, the slope of the budget constraint is 1.5. True False 4 points

Question 3 If the demand and supply curves have equal slopes in absolute value, the burden of a commodity tax will be split equally regardless of on whom the tax is placed. True False 4 points

Question 4 Suppose that supply is fixed at 100 units and demand is Q = 500 P. A price ceiling of $100 creates a shortage of 400 units. True False 4 points

Question 5 Housing shortages caused by rent controls are larger in the long run because the supply of housing is more elastic in the long run. True False 4 points

Question 6 Firms should exit the industry if average costs are greater than marginal costs. True False 4 points

Question 7 If a 3.67 percent increase in price causes a 1.97 percent decrease in quantity demanded, then total revenue must fall following an increase in price. True False 4 points

Question 8 Which of the following choices best illustrates the concept of Adam Smith's invisible hand ? A Vietnamese farmer grows rice; an exporter ships it to the United States, and a grocer in New York sells it to a customer. A fishery's stock of fish becomes depleted due to overfishing as boats from around the world converge. A government regulates a firm to clean up the pollutants it has released as part of its production process. An apartment building is built, which provides much needed housing, on the site of the only playground for children in that town. 4 points

Question 9 Figure: Labor Supply and Welfare Refer to the figure. The budget constraint is: ABC. BD. ABDC. ABD. 4 points Question 10 The price of coffee has increased, yet evidence suggests the demand for coffee has been stable. A possible explanation is that: there has been no change in the supply of coffee. there has been increased use of subsidies in coffee production. wages of workers in coffee production might have decreased. wages of workers in coffee production might have increased. 4 points Question 11 Which of the following statements is TRUE regarding profit maximization in competitive markets? I. When all firms pursue profits, none of them achieve profits. II. When all firms pursue profits, only the most innovative will achieve profits. III. Production is divided in such a way that total costs of production are minimized. I only II only I and III only II and III only 4 points Question 12 Suppose France can produce four phones or three computers with one unit of labor, and Sweden can produce one phone or two computers with one unit of labor. If France can trade only with Sweden, then the theory of comparative advantage suggests that: France should specialize in producing phones and import computers from Sweden. France should specialize in producing computers and import phones from Sweden. France should produce both phones and computers, and import nothing from Sweden. France should import both phones and computers from Sweden. 4 points Question 13 Potato chips and popcorn are substitutes. A subsidy for potato chips will ______the demand for popcorn and the quantity of popcorn sold will ______. (Table: Barrels of Oil) Refer to the table. What is the total amount of producer surplus (per barrel of oil) earned by all four producers if the market price per barrel of oil is $51? Table: Barrels of Oil Minimum willingness to sell Country a single barrel of oil Country A $32.00 Country B 16.00 Country C 17.25 Country D 56.99 increase; increase increase; decrease decrease; decrease decrease; increase 4 points Question 14 In the market for Good X a necessity good without any good substitutes the workers and capital in the industry can easily find work producing other goods. The burden of the tax is likely to fall: more heavily on buyers, given that demand is more inelastic than supply. evenly between buyers and sellers. more heavily on sellers, given that supply is more inelastic than demand. more heavily on buyers, given that demand is more elastic than supply. 4 points Question 15 A U.S. manufacturer arranges to purchase parts from a German supplier for 500,000 euros in six months. The U.S. manufacturer is concerned that the dollar will depreciate against the euro, meaning the dollar cost of the 500,000 euros will rise. What should the U.S. manufacturer do? lobby the Fed to lower interest rates on six-month T-bills buy a futures contract that fixes the dollar cost of 500,000 euros in six months buy an exchange rate contract that pegs the interest rate to the discount rate on interbank loans sell a naked option to cover the output spread 4 points Question 16 Which of the following scenarios would cause a speculator to buy low and sell high ? Farmers expect to have a bumper harvest of corn next year. Imports of corn begin to flood the country. The government is expected to pass legislation making it mandatory for all vehicles to use corn-based fuels within one year. The government is expected to subsidize corn production for farmers. 4 points Question 17 In a market with a price ceiling which of the following is TRUE? Buyers and sellers experience unexploited gains from trade. Resources are allocated to their most efficient uses. The supply of goods is sold by the sellers with the lowest costs. The supply of goods is bought by the buyers with the highest willingness to pay. 4 points Question 18 Consider the following statements: I. Relative to a no-trade situation, if the United States exported wheat, the U.S. domestic wheat price would rise and domestic production of wheat would expand. II. Relative to a no-trade situation, international trade causes prices of all goods to rise. I is true; II is false. I is false; II is true. Both I and II are true. Both I and II are false. 4 points Question 19 As the price of a good fluctuates, a profit-maximizing firm will expand or contract production along its: average cost curve. average product curve. marginal cost curve. marginal product curve. 4 points Question 20 An increase in demand and a decrease in supply occur in a market. What happens to the equilibrium price and quantity? The equilibrium price decreases; the change in the equilibrium quantity is ambiguous. The equilibrium price decreases; the equilibrium quantity increases. The equilibrium price increases; the change in the equilibrium quantity is ambiguous. The equilibrium price increases; the equilibrium quantity decreases.