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ECON 1 Lecture Notes - Lecture 6: Economic Surplus, Economic Equilibrium

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cerisegiraffe538
26 Mar 2015
School
Berkeley
Department
Economics
Course
ECON 1
Professor
Enrico Moretti

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Document Summary

Eco 1 : introduction to economics- lecture 6-efficiency of markets. Consumer surplus measures consumer gain from participating in the market. Consumer surplus is calculated by the (value to buyers) - (the amount paid). Willingness to pay (wtp); measures how much a buyer values a good, their set limit for the maximum amount a buyer will pay for it. Buyers and their wtp: john (), paul (80), george (70), and ringo (50) If the vinyl record is sold at , then no one would buy it because the item is out of anyone"s wtp. If the record is sold at , then john and paul would buy one because the item is in their individual wtp. If the record is sold at , then everyone is interested in buying this record. If the record is sold at , the cs for both john and paul would be (100-70) and (80-70) respectively.

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Related Questions

_____ 1. Suppose you make silver jewelry. If the price of silver falls, we would expect you to:

a. be willing and able to produce less jewelry than before at each possible price.

b. be willing and able to produce more jewelry than before at each possible price.

c. face greater demand for your jewelry.

d. face a weaker demand for your jewelry.

_____ 2. If suppliers expect the price of their product to fall in the future, then they will:

a. increase supply (supply curve shifts out) now.

b. decrease supply (supply curve shifts in) now.

c. increase supply in the future, but not now.

d. decrease supply in the future, but not now.

_____ 3. Consider the market for portable air conditioners, initially in equilibrium. When a heatwave strikes, the equilibrium price:

a. increases and equilibrium quantity decreases.

b. decreases, and the equilibrium quantity increases.

c. and quantity both increase.

d. and quantity both decrease.

_____ 4. Buyers can buy all they want to buy and sellers can sell all they want to sell at:

a. prices at and above the equilibrium price.

b. prices at and below the equilibrium price.

c. prices above and below the equilibrium price, but not at the equilibrium price.

d. the equilibrium price, but not at prices above or below the equilibrium price.

_____ 5. The law of supply and demand states that:

a. demand and supply curves shift out as time goes by.

b. the price of a goodwill rise in response to excess demand for that good.

c. when the supply curve for good shifts, the demand curve for that good shifts in response.

d. the equilibrium price of goodwill be rising more often than it will be falling.

_____ 6. If Doritos and Cheetos are substitutes, a rise in the price of Cheetos will cause:

a. the equilibrium quantity of Doritos to fall and the price of Doritos to rise.

b. the equilibrium quantity and price of Doritos to rise.

c. the equilibrium quantity and price of Doritos to fall.

d. the equilibrium quantity of Doritos to rise and the price of Doritos to fall.

_____ 7. New production technology is perfected that allows auto manufacturers to build an automobile using half the labor hours formerly needed. As a result:

a. the equilibrium quantity of automobiles increases and the price decreases.

b. the equilibrium quantity and price of automobiles increase.

c. the equilibrium quantity and price of automobiles decreases.

d. there is likely no change in the number of automobiles produced.

_____ 8. The U.S. government announces that it will raise the interest rate on college student loans beginning in January of next year. The immediate market impact is:

a. the demand curve for student loans shifts out.

b. the supply curve for student loans shifts out.

c. we anticipate that more student loans will be completed next year than this year.

d. all of the above are correct.

_____ 9. What curve shift produces a fall in price and increase in quantity exchanged?

a. An inward shift in the demand curve.

b. An inward shift in the supply curve.

c. An outward shift in the supply curve.

d. An outward shift in the demand curve.

_____ 10. We note that fewer motorcycles were sold this year than last and that the price is also lower. What event could have caused this outcome?

a. A technological change that improved the fuel efficiency of motorcycles.

b. A rise in the wages paid to motorcycle manufacturing workers.

c. A motorcycle craze due to the popularity of Sons of Anarchy.

d. Increasing concerns about health impacts from breathing motorcycle exhaust.

_____ 11. The price that results in quantity supplied equaling quantity demanded is the optimal (best) price because it:

a. maximizes the combined welfare of buyers and sellers.

b. maximizes the cost of the seller.

c. minimizes the expenditure of buyers.

d. all of the above are correct.

_____ 12. Consumer surplus is the:

a. quantity of good consumers get without paying anything.

b. amount a consumer pays minus the amount the consumer is willing to pay.

c. amount a consumer is willing to pay minus the amount the consumer pays.

d. value of a good to a consumer.

_____ 13. In a market, the marginal buyer is the one:

a. whose willingness to pay is higher than all other buyers and potential buyers.

b. whose willingness to pay is lower than all other buyers and potential buyers.

c. who is willing to buy exactly one unit of the good.

d. who would be the first to leave the market if the price were any higher.

_____ 14. If a consumer is willing and able to pay $20 for a particular good and if she actually pays $16 for the good, then her consumer surplus is:

a. $4.

b. $16.

c. $20.

d. $36.

_____ 15. Suppose there is an early freeze in California that reduces the size of the orange crop. What happens to consumer surplus in the market for oranges?

a. Consumer surplus increases.

b. Consumer surplus decreases.

c. Consumer surplus is not affected by this change.

d. We would have to know whether the demand for oranges is elastic or inelastic.

_____ 16. Producer surplus is the area on a supply/demand graph:

a. under the supply curve.

b. between the supply and demand curves.

c. below the price line and above the supply curve.

d. under the demand curve and above the price line.

_____ 17. Economists typically measure economic efficiency using:

a. total producer and consumer surplus.

b. profits to firms.

c. the quantity supplied by sellers.

d. the price paid by buyers.

_____ 18. Which of the following statements is correct?

a. Efficiency and equality are both maximized when total surplus is maximized.

b. Efficiency deals with the size of the economic pie; equality with how fairly the pie is sliced.

c. Efficiency is more difficult to evaluate than equality.

d. Equality is judged on positive grounds; efficiency requires normative judgments.

_____ 19. The price elasticity of demand measures how much:

a. quantity demanded a response to changes in price.

b. quantity demanded a response to changes in income.

c. price responds to a change in demand.

d. Both a and c are correct

_____ 20. Goods with many close substitutes tend to have:

a. less elastic demands.

b. more elastic demands.

c. price elasticities of demand that are unit elastic.

d. income elasticities that are negative.

Short Answer Questions:

All of the following questions are based on the data shown here for coffee demand and supply at a fictional Columbus coffee shop called Go-bucks.

Price Quantity Quantity

per Cup Demanded Supplied

$1.60 1,700 1,220

$1.80 1,555 1,300

$2.00 1,400 1,400

$2.20 1,235 1,520

$2.40 1,060 1,660

$2.60 875 1,820

_____ 21. (6 points) Using the mid-point formula, calculate the price elasticity of demand as the price increases from $1.60 to $1.80.

_____ 22. (6 points) Repeat the calculation of the price elasticity of demand, this time for a price increase from $1.80 to $2.00.

_____ 23. (6 points) Repeat the calculation of the price elasticity of demand, this time for a price increase from $2.40 to $2.60.

24. (4 points) Over which price range is demand inelastic? Over which price range is demand elastic? Does this follow the trend noted in class?

_____________________________________________________________________________

_____________________________________________________________________________

_____________________________________________________________________________

_____ 25. (6 points) Turning to the supply side, calculate the price elasticity of supply as the price increases from $2.20 to $2.40.

26. (2 points) How would you describe the price elasticity of supply over this range?

_____________________________________________________________________________

_____________________________________________________________________________

17. Which of the following is a determinant of supply?

A. Tastes and preferences

B. Price of a complementary good

C. Consumer income

D. Technology

 

18. A market is in equilibrium:

A. provided there is no surplus of the product

B. at all prices above that shown by the intersection of the supply and demand curves

C. if the amount producers want to sell is equal to the amount consumers want to buy

D. whenever the demand curve is downsloping and the supply curve is upsloping.

 

19. If the market price is above the equilibrium price:

A. A shortage will occur and producers will produce more and lower prices

B. A surplus will occur and producers will produce less and lower prices

C. A surplus will result and consumers will bid prices up

D. Producers will make extremely high profits

 

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

A. Raising the price of the commodity in question while increasing the quantity demanded

B. Raising the price of the commodity in question while decreasing the quantity demanded

C. Reducing the price of the commodity in question while increasing the quantity demanded

D. Reducing the price of the commodity in question while decreasing the quantity demanded

 

21. The price elasticity of demand measures:

A. buyer responsiveness to price changes.

B. the extent to which demand curve shifts as incomes change.

C. the slope of the demand curve.

D. how far business executives can stretch their fixed costs

 

22. The elasticity of demand for a product is likely to be greater:

A. if the product is a necessity, rather than a luxury good.

B. the greater the amount of time over which buyers adjust to a price change

C. the smaller the proportion of one's income spent on the product.

D. the smaller the number of substitute products available.

 

23. Market failure is said to occur whenever:

A. private markets do not allocate resources in the most economically desirable way

B. prices rise

C. some consumers who want a good do not obtain it because the price is higher than they are willing to pay

D. government intervenes in the functioning of private markets.

 

24. A negative externality or spillover cost occurs when:

A. firms fail to achieve allocative efficiency.

B. firms fail to achieve productive efficiency.

C. the price of the good exceeds the marginal cost of producing it.

D. the total cost of producing a good exceeds the costs borne by the producer

Question 11 One potential remedy to the tragedy of the commons is to: never allow a single individual to consume more than one percent of the common resource. criminalize the usage of common resources. allow individuals to use a common resource as long as they receive some benefit from doing so. place a common resource under private ownership. 4 points Question 12 As a result of a positional externality: contestants have a tendency to invest in a series of mutually offsetting investments in performance enhancement. there is generally an underinvestment in performance enhancement. the market price of performance enhancement materials is too high. the quality of performance in competitive situations is lower than the socially optimal level. 4 points Question 13 Which of the following statements is true regarding health insurance? Economics shows that all health related procedures should be free to individuals because the health of an individual is priceless. Total economic surplus would be larger if individuals faced an incentive to only use services when the benefit exceeds their costs. Health maintenance organizations provide an incentive for doctors to prescribe expensive nonessential services. First dollar insurance coverage has likely had very little to do with rising healthcare expenditures since World War II. 4 points Question 14 A strategy that yields a higher payoff no matter what the other players in the game choose is known as a: prisoner's strategy. dominated strategy. dominant strategy. Nash strategy. 4 points Question 15 Based on the diagram below, if the costs of hospital care are constant at $200 per day, and the individual does not incur any cost for each day for hospital care, then: the individual will stay 7 days and there will be no loss in economic surplus. the individual will stay 3 days and there will be no loss in economic surplus. the individual will stay 7 days and there will be lost economic surplus. the individual will stay 3 days and there will be lost economic surplus. 4 points Question 16 Economic research by Manning and colleagues suggests that people with deductible health insurance policies: spend substantially less on health care and have substantially worse health outcomes compared to people with first-dollar insurance coverage. spend substantially more on health care and have substantially better health outcomes compared to people with first-dollar insurance coverage. spend basically the same amount on health care and have substantially worse health outcomes compared to people with first-dollar insurance coverage. spend substantially less on health care and have no measurable difference in health outcomes compared to people with first-dollar insurance coverage. 4 points Question 17 An efficient program for reducing pollution is one for which: all polluters incur the same total costs of abatement. all polluters pay the same amount in taxes to the government. all polluters have the same marginal costs of abatement. all polluters reduce their emissions by the same amount. 4 points Question 18 Given the information on pollution abatement costs of the two firms shown below, which of the following is an efficient combination of pollution reduction? Quantity of pollution abatement Firm A's MC of abatement Firm B's MC of abatement 1 $30 $25 2 $35 $30 3 $40 $35 4 $45 $40 Firm A reduces by 1 ton and Firm B reduces by 1 ton. Firm A reduces by 2 tons and Firm B reduces by 3 tons. Firm A reduces by 4 tons and Firm B reduces by 1 ton. Firm A reduces by 3 tons and Firm B reduces by 2 tons. 4 points Question 19 All of the following are characteristics of perfectly competitive markets except: there are a large number of firms. productive resources are mobile. all firms produce a differentiated product. buyers and sellers are well informed. 4 points Question 20 An advantage of the auction method to pollution abatement is that: it is very expensive to firms. regulators can achieve a desired abatement target without having detailed knowledge of the abatement technologies available to polluters. it requires all firms to reduce by exactly the same amount. it assures that eventually society will reach a level of zero pollution emissions. 4 points Question 21 There are 2 firms each emitting 200 tons of a pollutant. Firm A's abatement costs are constant at $20/ton, and Firm B's abatement costs are constant at $40/ton. The government's goal is to reduce pollution by half. If the government auctions 200 one ton permits to the highest bidder: Firm A will purchase all 200 permits. Firm B will purchase all 200 permits. each firm will buy 100 tons. there is no way to know who the highest bidder for any permit would equal. 4 points Question 22 As a result of economies of scale, as output expands: fixed costs are decreasing. average total costs are decreasing. marginal costs are increasing. total costs are decreasing. 4 points Question 23 Generally, when countries open their borders to free trade: both domestic producers and consumers of imported goods gain. both domestic producers and consumers of exported goods gain. domestic producers of imported goods and domestic consumers of exported goods gain. domestic producers of exported goods and domestic consumers of imported goods gain. 4 points Question 24 Which of the following is the best example of a tariff? South Korea bans imports of U.S. beef because of safety concerns. The U.S. requires toys imported from China to undergo testing for lead content. The U.S. imposes a tax on sugar imported from Brazil. The U.S. restricts the quantity of cars imported from Japan. 4 points Question 25 A means-tested program is a benefit program: in which benefits decline as a recipient's earned income increases. in which all individuals must undergo health screening to be eligible for benefits. in which all recipients exclusively receive benefits through in-kind transfers. that only affects the average income of a specific segment of the population. 4 points Save and Submit Click Save and Submit to save and submit. Click Save All Answers to save all answers.