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MGEA01H3 Lecture Notes - Marginal Revenue, Numerical Analysis, Perfect Competition

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ochrefrog126
26 Jun 2012
School
UTSC
Department
Economics for Management Studies
Course
MGEA01H3
Professor
d

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MGEA01H3 Full Course Notes
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Document Summary

Profit = total revenue (p*q) total costs. = total revenue variable costs (in economic terminology) (operating profit = producer surplus in economic terminology) Accountants compare this operating profit with capital to find the rate of return on capital. Economics calculate economic profit from all costs, including the cost of capital calculated as the opportunity cost of capital. Definition: economic profit = total revenue (variable costs + fixed costs) Definition: normal profit = opportunity cost of capital. 0 economic profit = normal profit since it includes the opportunity cost of capital. Economic loss => economic profit < 0 (less than the opportunity cost of capital) Economic profit => economic profit > 0 (greater than the opportunity cost of capital) => find the output that maximizes profit (tr tc) => d (tr tc)/d q = 0. => d tr/d q d tc/d q = 0.

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Related Questions

1-7 True or False

1) In the short run, a perfectly competitive firm can earn positive, zero, or negative profit depending on the market price of the firm's output.

2)In the model of the perfectly competitive firm, the firm's fixed costs are equal to its implicit costs of production.

3)Assume the market price is greater than average total cost at the perfectly competitive firm's profit-maximizing level of output. In this case, the firm is earning positive economic profits, which act as an incentive for new firms to enter the market.

4)Assume that at the current level of output, price equals marginal revenue, but is less than average total cost. So long as price is greater than average variable cost, the firm should continue to operate in the short run to minimize its losses.

5)The fact that a firm is a price-setter does not ensure it will make a positive economic profit in the short run and over time.

6)Barriers to entry serve to limit the number of firms that operate in a particular market and, as 11) such, reduce the amount of total profit earned in the market.

7)In the prisoner's dilemma game, each player's dominant strategy is also the Nash equilibrium.

14-17 Multiple Choice

14) Marginal revenue is equal to:
A) the change in P x Q due to a one unit change in output. B) the change in quantity divided by the change in price.

C) the change in price divided by the change in output. D) price, but only if the firm is a price searcher.

15) In order to maximize its profits, a price-taking firm should produce the level of output at which:

A) marginal revenue = marginal cost. B) total revenue = total cost.

C) variable revenue = variable cost. D) average revenue = average cost.

16) Assume that there is an improvement in the technology used by firms in a perfectly competitive industry that is initially in long-run equilibrium. In the short run this would cause:

A) cannot be determined with the information given. B) no change in the firm's economic profit.
C) a decrease in the firm's economic profit. D) an increase in the firm's economic profit.

17) Assume at the firm's profit-maximizing level of output P = AVC. In this case, the firm will be:

A) incurring an economic loss. B) earning a positive economic profit.

C) earning economic profit = 0. D) breaking even.

Question 1

  1. If economic profits are zero

    accounting profits is less than the cost of capital.

    accounting profit is just covering the cost of capital.

    the cost of capital is negative.

    the entrepreneur should go to his/her next best alternative.

3 points

Question 2

  1. Markets provide

    information.

    prices.

    incentives.

    all of these choices.

3 points

Question 3

  1. The entrepreneur is always searching for

    positive profit.

    normal profit.

    accounting profit.

    economic profit.

3 points

Question 4

  1. Social regulations can create

    a more competitive market place.

    network externalities.

    a lower HHI.

    barriers to entry.

3 points

Question 5

  1. According to economic theory, profits are maximized where

    total revenue equals total cost.

    marginal revenue equals marginal cost.

    price and average cost are equal.

    where marginal product and average cost are equal.

3 points

Question 6

  1. Brand names help

    create commodities.

    maintain market power.

    create competition.

    keep economic profits at zero.

3 points

Question 7

  1. Entry of new firms causes

    accounting profits to go to zero.

    market share to grown.

    economic profits to go to zero.

    total revenue to be maximized.

3 points

Question 8

  1. Fixed costs

    do not vary with output

    vary with output

    do not vary with price

    vary with price

3 points

Question 9

  1. Variable costs

    do not vary with price.

    do not vary with output.

    vary with price.

    vary with output.

3 points

Question 10

  1. Value maximization means

    that managers make decision so as to increase the long-run market value of the financial claims on the firm.

    that a firm should make products that have the highest price.

    that managers make decision so as to increase the short-run market value of the financial claims on the firm.

    all of these choices.

3 points

Question 11

  1. A manager can determine if her product is viewed as a normal good or an inferior good by considering

    price elasticity.

    cross elasticity.

    income elasticity.

    advertising elasticity.

3 points

Question 12

  1. If demand is perfectly elastic,

    the smallest increase in price will cause quantity demanded to fall to zero.

    the smallest increase in price will cause demand to fall to zero.

    the smallest increase in price will cause quantity demanded to fall.

    the smallest increase in price will cause demand to fall.

3 points

Question 13

  1. If demand is perfectly elastic, then

    demand and price are inversely related.

    quantity demanded and price are inversely related.

    the demand curve is a vertical line.

    the demand curve is a horizontal line.

3 points

Question 14

  1. If price elasticity is 3.25 then

    for every one percent change in price, there will be a 3.25 percent change in quantity demanded.

    for every one percent change in price, there will be a 3.25 percent change in demand.

    for every one percent change in price, there will be a 32.5 percent change in quantity demanded.

    for every one percent change in price, there will be a .0325 percent change in quantity demanded.

3 points

Question 15

  1. If price elasticity is 3.25, then demand is

    inelastic.

    elastic.

    unitary.

    negative.

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.