ECN 104 Lecture Notes - Lecture 10: Monopolistic Competition, Marginal Revenue, Market Power

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taupewolf88

17 Feb 2018

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T. r = price * quantity = p * q. A. r = t. r / q = (p*q) / q = price. M. r = change in t. r / change in quantity = price. Perfectly competitive firm can max profit only by adjusting output. Total profit = total revenues total costs. Per unit profit = total profit / quantity. Firms short run supply curve is the portion of its mc curve above minimum avc. Technology increase marginal cost decreases supply increase. A wage increase shifts the supply curve to the left (decreasing supply) Wages increase marginal cost increase supply decrease. Technological process would shift the supply curve to the right. Supply curve shifts due to changes in marginal cost: Industry supply : summation of all the firms short run supply curves (mc) Over the long run, p = minimum atc. All firms will be similarly affected: firms seek profit and avoid losses, firms are free to

Related Questions

QUESTION 22

For a perfectly competitive firm, profit maximization (or loss minimization) occurs at the level of output at which

	a.	MR = MC.
	b.	MR = AVC.
	c.	P = ATC.
	d.	MR = ATC.

4 points

QUESTION 23

If MR > MC, then

	a.	profits are being maximized.
	b.	the firm is producing too much of the good to be maximizing profits.
	c.	the firm can increase its profits (or minimize its losses) by increasing output.
	d.	the firm must be incurring losses.

4 points

QUESTION 24

If firms are earning zero economic profits, they must be producing at an output level at which

	a.	price minus marginal cost.
	b.	total revenue equals total costs, in other words, normal profits.
	c.	price equals average variable cost.
	d.	marginal revenue equals marginal cost.
	e.	none of the above

4 points

QUESTION 25

In the theory of perfect competition,

	a.	the market demand curve is horizontal.
	b.	the single firm faces a horizontal demand curve.
	c.	the single firm faces a downward-sloping demand curve.
	d.	the market demand curve is downward sloping.
	e.	b and d

azureshark954

PROFIT MAXIMIZATION

Reminders:

Q: Quantity, TC: Total Costs, VC: Variable Costs, MC: Marginal Costs, MR: Marginal Revenue, TR: Total Revenue

1. Suppose the market for DVD movies is perfectly competitive. The industry price for the movies is $24, and a typical firm has the following total cost data:

Q	TC	VC	MC	MR	TR	Net Profit
0	10
1	33
2	53
3	70
4	90
5	114
6	143

a. Calculate the TR, MR, and MC for each level of output.

b. What condition must be met for the firm to maximize profits? What is the profit maximizing level of output and price for this firm? How much profit would be made?

2. Now suppose that some firms have been able to differentiate their DVDs, and the market has become monopolistically competitive. A typical firm now has the following demand schedule and total cost data:

Q	P	TC	VC	MC	MR	TR	Net Profit
0	40	8
1	35	20
2	30	28
3	25	40
4	20	56
5	15	76
6	10	100

a. Calculate the TR, MR, and MC for each level of output.

b. What condition must be met for the firm to maximize profits? What is the profit maximizing level of output and price for this firm? How much profit would be made?

1. When a profit-maximizing firm produces, they will be producing at that output at which marginal cost = marginal revenue:

all of the time
some of the time
on rare occasions
none of the time

2. Economics Profit is:

the same as accounting profit
sales minus explicit costs and implicit costs
sales minus variable costs and fixed costs
opportunity cost only

3. A market structure with so many firms that no one firm has any influence over price, and firms produce an identical product is called:

monopoly
oligopoly
perfect competition
monopolistic competition

4. Which of the following is NOT a characteristic of a perfectly competitive market?

identical products
perfect mobility
perfect knowledge
price maker

5. The demand curve in a perfectly competitive market is perfectly elastic.

true
false

emeraldwombat313

ECN 104 Lecture Notes - Lecture 10: Monopolistic Competition, Marginal Revenue, Market Power

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