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ECN 203 Lecture Notes - Lecture 4: Competitive Equilibrium, Economic Equilibrium, Perfect Competition

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blushbat715
29 Oct 2015
School
Syracuse University
Department
Economics
Course
ECN 203
Professor
Ashby

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Document Summary

Steps to demonstrating how competitive markets reach a long-run competitive equilibrium: Representative firm showing marginal cost curve (the upward portion of the marginal cost is the firm"s supply line) Step 2: determine the price the individual firm faces. The price the firm receives is a horizontal line from the equilibrium price set in the market. Price is determined in the market so many buyers and sellers, the individual firm is a price-taker must take the price as given (conditions #1 and #2) Step 3: determine the demand facing the individual firm. Demand is horizontal at the price line (it"s also the marginal revenue and average revenue). Implies the firm will sell some quantity of the good at the going market price. If try to sell for a higher price, the buyers will go elsewhere (many competitors) perfectly elastic. Step 4: determine the quantity (q) the firm will produce. The firm will produce the quantity where mc=p.

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Related Questions

1. Which of the following is a difference between a perfectly competitive market and a monopoly?

A. There are huge barriers to entry in a perfectly competitive market, while there are no barriers to entry in a monopoly.

B. The market demand curve faced by a perfectly competitive firm is horizontal, while the market demand curve in a monopoly is downward-sloping.

C. The sellers in a perfectly competitive market are price-makers, while a seller in a monopoly market is a price-taker.

D. The equilibrium price in a perfectly competitive market exceeds marginal revenue, while the equilibrium price in a monopoly equals marginal revenue.

 

2. Which of the following firms is likely to have the highest market power?

A. An oligopoly with homogeneous products

B. A monopoly

C. A monopolistic competitor

D. A perfectly competitive firm


1.
If firms in a monopolistically competitive market are earningpositive profits,
A) firms will likely be subject to regulation.
B) barriers to entry will be strengthened.
C) some firms must exit the market.
D) new firms will enter the market.
2.

Panel c in the set of figures shown is consistent with a firm in amonopolistically competitive market that is


A) earning profit and is in both short-run and long-runequilibrium.
B) earning economic profit and is in short-run equilibrium, but notlong-run equilibrium.
C) earning profit and is in long-run equilibrium, but not short-runequilibrium.
D) earning a negative profit and is not in equilibrium.
3.
When a profit-maximizing firm in a monopolistically competitivemarket is producing the long-run equilibrium quantity,
A) its marginal revenue will exceed its marginal cost.
B) its average revenue will equal its marginal cost.
C) it will be earning positive economic profits.
D) its demand curve will be tangent to its average-total-costcurve.
4.
Monopolistic competition differs from perfect competition becausein monopolistically competitive markets
A) each of the sellers offers a somewhat different product.
B) strategic interactions between firms is vitally important.
C) there are barriers to entry.
D) all firms can eventually earn economic profits.
5.
The free entry and exit of firms in a monopolistically competitivemarket guarantees that
A) economic losses can persist into the long run, but not economicprofits.
B) both economic profits and economic losses can persist into thelong run.
C) economic profits can persist into the long run, but not economiclosses.
D) both economic profits and economic losses disappear in the longrun.
6.


Panel (a) shows a profit-maximizing monopolistically competitivefirm that is

A) All answers are correct
B) earning a zero profit.
C) charging a price that is equal to average total cost.
D) in long-run equilibrium.
7.
Since a firm in a monopolistically competitive market faces a
A) perfectly elastic demand curve, it will always operate withexcess capacity.
B) downward-sloping demand curve, it will always operate atefficient scale.
C) perfectly inelastic demand curve, it will always operate atefficient scale.
D) downward-sloping demand curve, it will always operate withexcess capacity.
8.
In a monopolistically competitive market,
A) firms can enter or exit the market without restriction.
B) each firm takes the price of its product as given.
C) each firm produces a product that is essentially identical tothe products of other firms in the market.
D) there are only a few sellers.
9.
The fact that there is a great deal of advertising of men’s shavingproducts indicates that
A) it costs firms very little to produce those products.
B) the market for those products is perfectly competitive.
C) those products are highly differentiated.
D) All answers are correct
10.
A profit-maximizing firm in a monopolistically competitive marketdiffers from a firm in a perfectly competitive market because thefirm in the monopolistically competitive market
A) has no barriers to entry.
B) faces a downward-sloping demand curve for its product.
C) faces a horizontal demand curve at the market clearingprice.
D) is characterized by market share maximization.

1. A perfectly elastic demand function

Select one:

a. is characteristic of an individual firm operating in a perfectly competitive market.

b. shows that a consumer is willing to pay any amount for the product.

c. shows that the individual firm can increase sales by lowering the price of output.

d. has a marginal revenue that is always decreasing.

 

2. Your local farmer has many competitors and exists in a market structure known as perfect competition. This means that price is determined outside of the individual farmer's ability to charge a price higher than the going market for a bushel of wheat, hence the farmer is

Select one:

a. a price maker and can therefore charge different customers different prices.

b. a price taker and cannot affect the market price of wheat.

c. always able to price produce above the competition and earn a larger profit.

d. never able to determine any prices he charges for anything, such as soybeans

 

 

3. All of the following are true regarding perfectly competitive price determination EXCEPT

Select one:

a. the individual firm takes the market price as given.

b. the individual firm is known as a market price maker.

c. the individual firm's marginal revenue curve is horizontal at the market price.

d. the market price is determined by the interactions among all buyers (households) and firms.