ECON 3500 Lecture Notes - Lecture 11: Demand Curve, Marginal Cost, Externality

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12 Apr 2018

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The capital costs of light rail are lower than the capital cost of heavy-rail systems such as. Bart but higher than the capital cost of a bus system. The operating costs are slightly higher than the operating costs of a bus system. Bart and bus curve: disutility of bus versus car. Sharing space with other passengers increases the disutility of the bus (the armpit factor), while the opportunity to sleep decreases the disutility of the bus. The stress of driving increases the disulity of driving. If the disutility of the bus is greater, we would shift the bus cost curve upward and the range over which buses are more efficient than cars is. The price elasticity of demand is one third, so a 100 percent reduction in price increases the quantity demanded by one third: the demand curve intersects the horizontal axis at 160,000 riders, and at a price of.

Related Questions

True/False
If the quantity demanded for a product increases from 100 to 150 units when
the price decreases from $14 to $10, the price elasticity of demand for this product,
using the midpoint formula, in this price range is 1.2

A product with a price elasticity of demand equal to 1.5 is described as price
inelastic.

Demand tends to be inelastic at higher prices and elastic at lower prices.

Multiple Choice
If price rises from $80 to $90 and quantity demanded falls from 250 to 200,
then
a. The demand is inelastic
b. Total receipts rise.
c. Elasticity is equal to 0.625.
d. Elasticity is greater than one.

When Detroitâs bus fare increased from 40 cents to 60 cents, the number of riders
decreased from 800 per week to 620 per week. Over the price range given, the demand
curve for bus service in Detroit is
a. Elastic
b. Unit elastic
c. Inelastic
d. Impossible to determine

Stanâs Discount Tires reduced the price on its Goodyear radial tires from $65
per tire to $55 per tire. The following month, sales of this tire increased from
320 units to 500 units. The coefficient of elasticity for this tire was
a. 1.0
b. 0.63
c. 3.65
d. 1.33

A 20 percent increase in Miss Sarloâs income resulted in an increase in her
annual consumption of steak from 10 to 15 pounds. Miss Sarloâs income elasticity
of demand for steak is
a. 0.25
b. 0.50
c. 2.0
d. 2.5

lavenderelephant611

QUESTION 16

Which of the following statements is true?

		The administrative costs per dollar are greater for a large loan than a small loan.
		The risk on a long-term loan is likely to be less than on a short-term loan, ceteris paribus.
		a and b
		none of the above

1 points

QUESTION 17

If the price for loanable funds is less than the return on capital, then firms will

		borrow in the loanable funds market and invest in capital goods, and as this happens, the quantity of capital decreases and its return rises.
		borrow in the loanable funds market and invest in capital goods, and as this happens, the quantity of capital increases and its return falls.
		not borrow in the loanable funds market, and over time the capital stock will decrease and the return on capital will fall.
		not borrow in the loanable funds market, and over time the capital stock will decrease and the return on capital will rise.

1 points

QUESTION 18

Economic rent is

		the payment a renter pays his or her landlord.
		payment in excess of fixed costs.
		payment in excess of opportunity costs.
		the same as interest if we are discussing a capital good purchase.
		none of the above

1 points

QUESTION 19

Suppose a bank makes a $1,000 loan to you at 5 percent interest when the expected and actual inflation rate are zero percent. Before you pay back the $1,000 principal and $50 interest, the inflation rate increases to 10 percent. Does anyone lose from this situation?

		Nobody loses, because the terms were set before the inflation rate increased, and once the terms are set, inflation does not affect the situation.
		You lose, because the dollars that you have borrowed are worth more the higher the inflation rate.
		The banker loses, because you will be paying back the loan with dollars that are worth less than the dollars you borrowed.
		Both the banker and you lose, for the reasons in answers b and c.
		There is not enough information to answer the question.

1 points

QUESTION 20

A change in the expected rate of inflation from 5 percent to 3 percent will

		decrease the real interest rate by 2 percentage points.
		decrease the real interest rate by 3 percentage points.
		increase the nominal interest rate by 2 percentage points.
		decrease the nominal interest rate by 2 percentage points.

1. Suppose that there is a tax of $1 per unit, and the elasticity of supply is 3 and the elasticity of demand is 2 (in absolute value). How much of the $1 tax is paid by sellers?

		$0.60
		$0.40
		$0.75
		$0.67

2. In Market X, the external benefit of consumption is $5. In Market Y, the external cost of consumption is $10. Efficiency in both markets could be achieved by:

		a tax of $5 in Market X and a subsidy of $10 in Market Y.
		subsidizing both markets.
		taxing Market Y and subsidizing Market X.
		taxing both markets.

3.Economic theory suggests that a natural monopoly should be:

		eliminated whenever it arises.
		regulated to take advantage of economies of scale.
		left alone to operate with excess capacity.
		taken over by the government.

4.When the size of the production is the most efficient:

		total cost is at the minimum.
		average cost is at the minimum.
		marginal cost is at the minimum.
		fixed cost is at the minimum.

5.A firm should exit the industry if which of the following conditions apply?

		TR > TC
		P < AC
		Lifetime expected profit is positive.
		Prices are low now but expected to rise.

6.Figure: Costs

Reference: Ref 11-6

(Figure: Costs) Use the figure. At a price of $20, the firm earns profit of:

		$75.
		$300.
		$225.
		$0, because P = MC at P = $20.

7.When external benefits are present, the market price is ________, however when external costs are present, the market price is ________.

		too low; too high
		equal to the efficient price; too low
		too high; too low
		equal to the efficient price; too high

8.Which of the following statements is TRUE?

I. The EPA's tradeable allowances program for sulfur dioxide establishes property rights to pollute and helps reduce transaction costs by distributing allowances, maintaining databases, and monitoring emissions.

II. One criticism of tradeable allowances is that they prohibit non-businesses and environmental groups from purchasing the allowances.

III. The tradeable allowances for sulfur dioxide have performed poorly because electricity output has increased, causing a rise in sulfur dioxide levels.

		I only
		II and III only
		I, II, and III
		III only

9.Price floors make it illegal to compete for more customers by lowering prices, so firms compete by offering customers:

		various options.
		more quantity.
		more discount.
		higher quality.

10.Figure: Government Price Controls

Reference: Ref 8-3

(Figure: Government Price Controls) Refer to the figure. If the government sets the price ceiling at $31, there will be:

		a shortage of 15 units.
		a surplus of 15 units.
		a supply of 20 units.
		no effect on the market.

11.In which of these instances does price function as a signal in the market?

		Suppliers invest more in exploration when the price of oil increases.
		Consumers complain of price gouging as the price of oil skyrockets.
		Government imposes price controls on the skyrocketing price of oil.
		All of the answers are correct.

12.Ethanol and sugar are both made from sugar cane, and ethanol can be used as substitute fuel for oil. Increasing oil prices cause the demand for ethanol to increase. This will cause the ______ sugar to ______ and its price to ______.

		demand for; decrease; decrease
		supply of; increase; increase
		supply of; decrease; increase
		demand for; increase; increase

13.Why do cotton growers spend billions of dollars to dam rivers and transport water hundreds of miles to grow cotton in California deserts?

		Cotton growers in California don't pay payroll taxes.
		The water used to grow California cotton is highly subsidized by the government.
		Cotton growers in California are mostly operated as nonprofit enterprises.
		The water used to grow California cotton is high in mineral contents, making for a bigger cotton yield.

14.Suppose that the equilibrium price in the market is $10. If the current market price is $7.50:

		the equilibrium price will fall to $7.50.
		competition among buyers will increase the current price.
		the current price will fall below $7.50 as sellers compete for market share.
		There is not enough information provided to answer the question.

15.Which of the following would increase the demand for beef?

		lower pork prices
		higher consumer income
		higher prices of feed grains used to feed beef cattle
		an increase in the price of beef

16.A change in quantity supplied is reflected by a movement along the same supply curve while a change in supply refers to a shift in the entire supply curve.

True

False

17.Table: Production in the United States and Germany

Labor units required to produce:

One Clock

One Sofa

United States		2	5
Germany		3	9

Reference: Ref 2-8

(Table: Production in the United States and Germany) According to the table, the opportunity cost of producing one sofa in the United States is _________, and the opportunity cost of producing one sofa in Germany is _______.

		two clocks; three clocks
		10 clocks; 27 clocks
		0.4 clocks; 0.33 clocks
		2.5 clocks; three clocks

18.Mark values his drum set at $800 and Ella values her guitar at $1,000. Suppose that Mark trades his drum set for Ella's guitar.

		This trade makes Ella worse off by $200.
		This trade makes Mark better off by $200.
		Mark must value Ella's guitar for at least $1,000, and Ella must value Mark's drum set for at least $800.
		This trade creates value by moving the guitar and drum set to people who value them more.

ECON 3500 Lecture Notes - Lecture 11: Demand Curve, Marginal Cost, Externality

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