ECON 2210 Lecture Notes - Marginal Cost

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10 May 2013

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Large markets allow for so much greater gains from specialization. Comparative advantage means production takes place at least cost. Slope of the production possibility curve at any point tells us the marginal cost of producing one more unit of something else: height of the curve is the marginal cost of producing a given quantity. Marginal curves can slope upwards because different individuals have different costs of production was. Height of the marginal cost curve is the incremental cost from increasing output by an infinitesimal amount. Marginal cost would be the area under the marginal cost curve between two different levels of output. If difference in the levels of output was one unit, then the marginal cost would be the cost of producing one more unit. Total revenue is price times quantity, area under the marginal cost curve is total cost, difference between the two (revenue cost) is the seller"s surplus.

Related Questions

For which of the following nations does international trade account for the largest percentage of GDP?
A) Japan
B) The Netherlands
C) Germany
D) Great Britain
E) the United States

2. Suppose that workers in Transylvania can produce only two goods-- yo-yos or sweat socks. The Transylvanian currency is the dealer. In what unit is the opportunity cost of yo-yos measured?
A) dealers
B) dealers per yo-yo
C) dealers per sweat sock
D) yo-yos
E) sweat socks

3. For each watch Denmark produces, it gives up the opportunity to make 50 pounds of cheese. Germany can produce one watch for every100 pounds of cheese it produces. Which of the following is true with regard to opportunity costs in the two countries?
A) The opportunity cost of producing watches is lower in Denmark.
B) The opportunity cost of producing cheese is lower in Denmark.
C) The opportunity cost of producing watches is identical in both countries.
D) It is impossible to compare opportunity costs because the two countries use different currencies.
E) In Germany the opportunity cost of producing one pound of cheese is one watch.

4. For each bow the Romans are producing, they give up the opportunity to make 10 arrows. The Dacians are giving up producing2 bows for every 40 arrows they are producing. Which of the following is true regarding comparative advantage?
A) The Romans have a comparative advantage in producing arrows
B) The Romans have a comparative advantage in producing bows
C) The Romans have a comparative advantage in producing arrows and bows
D) The Dacians have a comparative advantage in producing arrows and bows
E) The Dacians have a comparative advantage in producing bows

5. Which of the following is not a basis for trade between two nations?
A) different skill levels of the labor forces
B) one nation's absolute advantage
C) a difference in tastes between countries
D) economies of scale
E) different capital stocks

6. The opportunity cost of producing one car in Germany is 2,000bushels of wheat, and the opportunity cost of producing one car in Canada is 1,200 bushels of wheat. The two countries can realize mutual gains from trade if they agree on terms of trade that are
A) greater than 2,000 bushels of wheat per car
B) less than 1,200 bushels of wheat per car
C) greater than 1,200 bushels of wheat per car and less than 2,000bushels of wheat per car, and Germany produces wheat
D) greater than 1,200 bushels of wheat per car and less than 2,000bushels of wheat per car, and Germany produces cars
E) greater than 1,200 bushels of wheat per car and less than 2,000bushels of wheat per car, and each country produces both goods

7. The rate at which two countries trade one good for another
A) is known as the foreign exchange rate
B) is known as the terms of trade
C) is known as the export line
D) equals the slope of the import line
E) equals the common slope of the countries' production possibilities frontiers

8. Which of the following is true?
A) International trade makes it possible for a country's consumption possibilities to exceed its production possibilities.
B) International trade requires that a country's production possibilities exceed its consumption possibilities.
C) A country's production possibilities always equal its consumption possibilities.
D) A country's consumption possibilities can never equal its production possibilities because of leakages in the system.
E) As long as there is full employment of resources, a country's production possibilities will exceed its consumption possibilities even with trade.

9. Which of the following is not a reason for international specialization?
A) some countries have educated, trained workers, while other countries have unskilled workers
B) tastes and preferences tend to be different in different countries
C) economies of scale can allow larger, specialized producers to operate at a lower average cost
D) mineral resources are often concentrated in particular countries
E) the world price of a good is determined by the world supply and demand for it

10. Ad valorem tariffs on imports are based on a percentage of an import's value; specific tariffs are based on a lump sum per physical unit imported.
A) True
B) False

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Managers of a monopoly under rate of return regulation have an incentive to

a. underestimate the firm's costs.

b. exaggerate the firm's costs.

c. minimize the monopoly's deadweight loss.

d. exaggerate the firm's profit.

e. earn zero economic profit.

Which of the following is correct?
i. All linear demand curves have a constant slope and a constant price elasticity of demand.
ii. The price elasticity of demand changes while moving along a downward-sloping linear demand curve.
iii. The magnitude of the slope of all linear demand curves is equal to the price elasticity of demand.

a. iii only.

b. ii only.

c. i, ii, and iii.

d. i only.

e. i and ii.

________ natural monopolies is a commonly used, potential solution to the problems presented by natural monopolies.

a. Giving incentives to firms to become

b. Regulating

c. Breaking up firms that are

d. Outlawing price discrimination by

e. Refusing to grant patents to

In the short run, a perfectly competitive firm

a. must suffer an economic loss.

b. must earn an economic profit.

c. might make an economic profit, incur an economic loss, or make a normal profit.

d. must make either an economic profit or a normal profit.

e. must earn a normal profit.

To determine if a market is an oligopoly, we need to determine if

a. cartels are legal in their market.

b. the firms are so few that they recognize their mutual interdependencies.

c. the firms make identical or differentiated products.

d. there are many firms in the market.

e. the market's HHI is less than 900.

Increasing marginal returns to labor

a. occur only when there are increasing marginal returns to capital.

b. are the result of specialization and division of labor in the production process.

c. describe the portion of a total product curve where the marginal product is negative.

d. mean that two workers produce less than twice the output of one worker.

e. occur when a particularly efficient worker is employed.

The return to entrepreneurship, which is what the firm's owner could earn running another business, is known as

a. entrepreneur's profit.

b. economic profit.

c. excessive profit.

d. accounting profit.

normal profit.

Both price supports and a price floor can

a. decrease the price below the equilibrium price.

b. increase consumer surplus.

c. create a deadweight loss.

d. decrease output below the equilibrium quantity.

e. have no effect on producer surplus.

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

If a substitute good is easy to find, then demand for a good is

a. unit elastic.

b. perfectly inelastic.

c. elastic.

d. inelastic.

e. Substitutes don't have any effect on elasticity.

Question 26 pts

Which of the following is not a reason why specialization and trade are beneficial to society?

	Specialization fosters learning by doing, thus lowering the unit-costs of products
	Firms and workers become less dependent on others for producing goods and services

	The total output of economic goods may be increased even without any increase in resources
	Scarce resources are utilized more efficiently by exploiting differences among them

Question 27 pts

Laissez-faire capitalism limits the government's economic functions to the following, except:

	Protecting private property rights
	Establishing a legal environment to enforce contracts among individuals

	Setting prices of individual goods and services
	Preventing individuals and firms from coercing others

Question 28 pts

A production system where various workers concentrate on different specialized tasks to contribute towards a whole product is referred to as:

	Roundabout production
	A coincidence of wants

	Freedom of enterprise
	Division of labor

Question 29 pts

The market system is said to be characterized by "consumer sovereignty." This is because:

	A sovereign government determines which consumer goods will be produced
	Firms must match their production decisions to the consumers' choices

	The prices of consumer goods are regulated by a sovereign government
	Consumer goods are considered to be more important than capital goods

Question 30 pts

Consumers express self-interest when they:

	Seek the lowest price for a product
	Reduce business losses

	Exclude others in their thinking
	Collect economic profits

Question 311 pts

Refer to the above graph with three demand curves. An "increase in quantity demanded" would be illustrated by a change from:

	Point 5 to point 1
	Point 4 to point 1

	Point 2 to point 5
	Point 4 to point 6

Question 32 pts

The table below shows the weekly demand for hamburger in a market where there are just three buyers.

Refer to the above table. At a price of $6, the weekly market quantity demanded for hamburger is:

	17
	23

	24
	18

Question 33pts

If farmers withhold some of their current corn harvest from the market because they anticipate a higher price of corn in the near future, then this would cause a(n):

	Movement up along the current supply curve of corn
	Movement down along the current supply curve of corn

	Leftward shift in the current supply of corn
	Rightward shift in the current supply of corn

Question 34 pts

Which of the following will not cause the supply curve to shift?

	A technological change in the production of the good
	A change in the prices of other goods that producers could be producing

	A change in the costs of resources needed to produce the good
	A change in the price of the good

Question 35 pts

All of the following would affect the position of the supply curve for cranberries, except the:

	Price of agricultural land for cranberries
	Cost of fertilizers for cranberry production

	Popularity of cranberry drinks
	Development of a new pest control for cranberries

Question 36 pts

When high-school and college graduates apply for jobs in the labor markets,

	Job applicants and employers are both "buyers".
	Job applicants are the "sellers" while employers are the "buyers".

	Job applicants and employers are both "sellers".
	Job applicants are the "buyers" while employers are the "sellers".

Question 37 pts

Refer to the figure above, which shows three supply curves for corn. Which of the following would cause the supply of corn to shift from S₁ to S₂?

	A decrease in consumer incomes, assuming corn is a normal good
	The development of a more effective insecticide against corn rootworm

	An increase in the price of fertilizer
	A change in consumer tastes away from cornbread

Question 38 pts

Which is of the following statements is correct?

	If demand increases, then price will decrease
	If demand decreases, then price will decrease

	If price decreases, then demand will decrease
	If price increases, then demand will decrease

Question 39 pts

Which would be a likely cause of an increase in the demand for pizza?

	A decrease in the price of hamburger sandwiches
	A health report showing eating pizza reduces stress

	A reduced desire for take-out and fast-food dining
	A decrease in the prices of cheese, pepperoni, and mushrooms

Question 40 pts

A market for a product reaches equilibrium when:

	Price falls further after there is a shortage
	The price rises further after there is a surplus

	Buyers intend to buy a quantity equal to the quantity that sellers intend to sell
	The actual quantity bought by buyers equals actual quantity sold by sellers

Question 41 pts

A higher price reduces the quantity demanded for a product because:

	Individuals can afford less of the product and will switch to substitutes
	The financial assets of individuals increase

	Individuals will buy more of the product and less of its substitutes
	The purchasing power of individuals increases

Question 42 pts

The idea of the Law of Demand, as applied to electric cars, assumes which of the following to be constant?

	Price of electric cars
	How much sellers are charging customers for electric cars

	Price of gasoline cars
	Quantity of electric cars demanded by buyers

Question 43 pts

Use the following graph of the demand for coffee:

Refer to the above diagram of three demand curves for coffee. An increase in the price of coffee, other factors constant, would cause a:

	Movement from point a to point b
	Movement from point b to point a

	Shift from D₁ to D₂
	Shift from D₁ to D₃

Question 44 pts

Which of the following factors will decrease the current demand for a product?

	A decrease in the current price of a complementary product
	A decrease in the current price of a substitute product

	An increase in the current price of a substitute product
	An expected increase in the future price of the product

Question 45pts

In competitive markets, a surplus or shortage will:

	Cause shifts in the demand and supply curves that tend to eliminate the surplus or shortage
	Cause changes in the quantities demanded and supplied that tend to intensify the surplus or shortage

	Cause changes in the quantities demanded and supplied that tend to eliminate the surplus or shortage
	Never exist because the markets are always at equilibrium

Question 46 pts

Which of the following would cause a leftward shift in the supply curve for car washes?

	A decrease in taxes on car washes
	An increase in the price of car washing equipment

	A decrease in the price of water
	An increase in the number of cars in the city

Question 47pts

The market system automatically corrects a surplus condition in a competitive market by:

	Raising the price of the commodity in question while decreasing the quantity demanded
	Raising the price of the commodity in question while increasing the quantity demanded

	Reducing the price of the commodity in question while increasing the quantity demanded
	Reducing the price of the commodity in question while decreasing the quantity demanded

Question 48 pts

A leftward shift of the supply curve for oil in the United States is most likely to result from:

	A decrease in the world price of oil
	An increase in the costs of exploration and drilling for oil

	An increase in the subsidy for oil exploration and drilling
	A decrease in the fees that oil companies must pay for drilling licenses

Question 49 pts

A fall in the price of milk, used in the production of ice cream, will:

	Decrease the supply of ice cream
	Have no effect on the supply of ice cream

	Increase the supply of ice cream
	Cause a movement along the supply curve of ice cream

Question 50 pts

Refer to the above graph, which shows the market for beef where demand shifted from D₁ and D₂. The change in equilibrium from E₁ to E₂ is most likely to result from:

	An increase in the cost of cattle feed
	A decrease in consumer incomes

	A decrease in the tax on beef products
	An increase in the price of pork

ECON 2210 Lecture Notes - Marginal Cost

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