ECON 1000 Lecture Notes - Lecture 9: Perfect Competition, Economic Surplus, Demand Curve

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yellowbear141

27 Feb 2016

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We now know that equilibrium prices and quantities are determined by the demand and supply curves for the respective goods/services. In this chapter, we discuss welfare economics: the study of how the allocation of resources affects economic well-being: not public assistance programmes, previous chapters were about positive analysis this is normative . We begin by examining the benefits that buyers and sellers receive from taking part in a market. We then examine how markets can work to make these benefits as large as possible. At any q, the demand curve shows the willingness to pay of the marginal buyer, ie the one who would drop out at any higher price. Because the demand curve reflects buyer"s willingness to pay, it can also be used to measure consumer surplus. As the price falls, additional consumers with lower wtp( willingness to pay) can purchase. The difference between the willingness to pay and the market price is each buyers consumer surplus.

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?

_____________________________________________________________________________

graychimpanzee865

Target Statement for Assignment 8

When IT procurement managers do business across a transnational border (or choose which borders to negotiate across) it will be helpful for managers to be aware of what restraints or pressures exist on both sides of the border that will affect the negotiated price of the product or service being acquired. The understanding that Garrettâs entire pricing theory depends on the macroeconomic (and hence also political) environment emerges from considering relations between contract pricing and economic theory, specifically, the âreservation priceâ and âeconomic calculation problemâ.

A fixed-price strategy in Garrettâs account does not mean a price that is fixed legally; it means a price that is determined by negotiation between free parties, such as is described in Ch. 8, pp. 105-106. That is, in Garrettâs pricing theory there is a transaction pricing calculation performed on each side of the transaction. Contract pricing is a decision, about which what matters is not the type of contract but the locus of the decision, that is, who makes the decision, and under what constraints?

Garrettâs Chapter 8 answers: buyer and seller make the decision. In a free-market economy, the pricing decision would be entirely an outcome of their negotiation. In an interventionist economy, the decision is in part an outcome of the buyer-seller negotiation; however, the cost of such interventions as taxes, regulations, currency instability, or contract impairment by monetary inflation, and any price caps or floors are built into or reflected by the sellerâs offering price.

In free market economic planning where there is zero central economic planning, a first approximation to a contract price that is freely set by buyer and seller is the reservation price or âwalk-awayâ price for the buyer. The seller, too, has a âwalk-awayâ price. The negotiation can only occur, resulting in a contract, in the interval between the two. Buyer and seller make a decision through a negotiation based on the sellerâs estimate of the cost of performance and the buyerâs estimate of what price the market, established by other potential sellers, would bear -- both estimates being a function of history.

According to the economic calculation problem described by the economist Ludwig Von Mises, a freely agreed upon price that reflects the combination of the buyerâs and sellerâs needs or desires is based on a calculation of the type that cannot be performed in a condition of central economic planning by a government. Under central economic planning, or socialism, price determination is not a function of trading history, or of the sellers' willingness to sell or the buyers' willingness to buy at a given price, rather it is either an arbitrary or politically-influenced decision. Such central economic planning, Von Mises observes, replaces economic calculation â the statistical aggregate of all individual actions by buyers and sellers who freely set prices by their own transaction pricing calculations.

Under the free market modeled in the theory of Von Mises, contract pricing relies on the absence of such market intervention so that buyer and seller are totally free to set a price that allows a contract to occur in the interval between the seller's and buyer's respective walkaway prices. This decision of both parties to agree on a price in that interval is one component of economic calculation â a component that applies to a single trade or transaction and contributes to the statistical aggregate which, in turn, tends to govern resource allocation so as to bring supply and demand into alignment.

To a lesser extent, contract pricing described by Garrett in Chapter 8 relies largely on the absence of central economic planning. Why? Because when the state intervenes it either substitutes its decision for that of the buyer and seller, or at a minimum imposes price controls that either foster shortages or surpluses or else tend to preclude the contract from ever happening if the controlled price is below the sellerâs cost estimate.

Under contract pricing as described by Garrett, the parties to the contract are still able to perform calculations of reservation (walkaway) prices and determine whether they can do the deal at some price in the interval that does not cause either to walk away. However, in a market that is only partially free, interventions such as regulations, taxes, currency exchange fluctuations, or monetary inflation that increase the sellerâs cost do alter the pricing calculation and tend to narrow the interval within which the buyer and seller can come to agreement. That still-intact possibility of agreeing on a price sensitive to market conditions is the essence of the relationship between the economic theory of Von Mises and the contract pricing theory of Garrett.

chocolateraven16

In a perfectly competitive market, in the long run, the marginal cost of a firm becomes equal to its minimum average total cost.

A) True
B) False

Generally, The price a firm charges for its product is equal to its total revenue divided by the number of units sold.

A) True
B) False

In a perfectly competitive firm to maximize profit a firm must make sure that the price it charges does not exceed its marginal cost.

A) True
B) False

Firms in a competitive market can never make economic profits while they may make biasness (accounting) profits.

A) True
B) False

When a perfectly competitive firm is making a positive economic profit its average revenue must be greater than its average total cost.

A) True
B) False

To maximize its profit a firm always produces at the quantity level where it can charge the highest price and earn the greatest revenue; this strategy is consistent with setting is MC equal to price.

A) True
B) False

When a firm in a competitive market is making a positive economic profit its business profit may be positive or negative.

A) True
B) False

In a perfectly competitive market new entries could result in increases in input prices thus making production costs go up.

A) True
B) False

In a perfectly competitive market, in the long run, each firm produces the maximum amount it can produce and charges the lowest price possible. That is why we consider competitive markets efficient.

A) True
B) False

10.

A monopolist always under-produces and charges a price higher than its MC.

A) True
B) False

11.

As the only supplier in the market a monopolist can charge any price it wishes and buyers have no choice but to pay.

A) True
B) False

12.

The marginal revenue is the additional revenue generated by the last unit of labor hired.

A) True
B) False

13.

The price a monopolist charges may or may not be above its average cost but it is always above its MR.

A) True
B) False

14.

When demand curve is a downward-sloping straight line (linear) marginal revenue will be greater than MC at all output leveles.

A) True
B) False

15.

By setting its MR equal to its MC a monopolist determines the output that would maximize its profit.

A) True
B) False

16.

In the long run each competitive firm would produce at the quantity level where its MC is equal to its MR as well as its ATC.

A) True
B) False

17.

A monopoly always makes an economic profit.

A) True
B) False

18.

When a monopoly's ATC is equal to the price it charges it is making normal economic profits.

A) True
B) False

19.

When a monopoly is making a zero economic profit still its MR>ATC.

A) True
B) False

20.

An increase in demand would enable a monopolist to raise its price while reducing its output.

A) True
B) False

21.

The market supply curve in an increasing-cost industry is:

A) a. upward sloping
B) b. downward sloping
C) c. vertical
D) d. horizontal
E) e. none of the above

22.

The total producer surplus is measured by:

A) a. the area between supply and demand curves.
B) b. the difference between the price the consumer is willing and able to pay and the price suppliers wish to charge to maximize their profits.
C) c. the area between the price consumers actually pay and the demand curve.
D) d. the area between the equilibrium market price and the supply curve.
E) e. the consumer willingness to pay as reflected by the equilibrium market price.

23.

. Economists measure economic (social) welfare by the

A) a. net consumer surplus
B) b. sum of consumer and producer surplus
C) c. sum of the net profits made by the industry's competitive firms
D) d. price consumers are willing to pay for one additional unit of a good
E) e. difference between the total consumer surplus and total producer surplus

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ECON 1000 Lecture Notes - Lecture 9: Perfect Competition, Economic Surplus, Demand Curve

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