1 Chapter 9 Pricing and Output Decisions: i Perfect Competition and Monopoly M i l E i E i Managerial Economics: Economic Tools for Today s Decision Makers, 4/e By Paul Keat and Philip Young
2 Pricing and Output Decisions: Perfect Competition and Monopoly Four Basic Market Types Pricing and Output Decisions in Perfect Competition Basic Business Decision Key Assumptions Total lrevenue - Total lcost Approach Marginal Revenue - Marginal Cost Approach Economic Profit, Normal Profit, Loss, and Shutdown The Long Run Pricing and Output Decisions in Monopoly
3 Four Basic Market Types Perfect Competition Monopoly Monopolistic i Competition i Oligopoly
4 Four Basic Market Types Perfect Competition (no market power) Large number of relatively small buyers and sellers Standardized product Very easy market entry and exit Non-price competition not possible
5 Four Basic Market Types Monopoly (absolute market power subject to government regulation) One firm, firm is the industry Unique product or no close substitutes Market entry and exit difficult or legally ll impossible Non-price competition not necessary
6 Four Basic Market Types Monopolistic Competition (market power based on product differentiation) Large number of relatively small firms acting independently Differentiated product Market entry and exit relatively easy Non-price competition very important
7 Four Basic Market Types Oligopoly y( (market power based on product differentiation and/or the firm s dominance of the market) Small number of relatively large firms that are mutually interdependent Differentiated or standardized product Market entry and exit difficult Non-price competition very important among firms selling differentiated products
8 Four Basic Market Types
9 Pricing and Output Decisions in Perfect Competition The Basic Business Decision The decision to continue competing in a market depends upon the answers to the following questions: How much should we produce? If we produce such an amount, how much profit will we earn? If a loss rather than a profit is incurred, will it be worthwhile to continue in this market in the long run or should we exit?
10 Price taker Key Assumptions in Perfect Competition Distinction between short run and long run Objective is to maximize profit or minimize loss in the short run Opportunity cost is included in decision making
11 Key Assumptions in Perfect Competition Review of terminology Economic cost includes explicit costs and opportunity costs Normal profit occurs when revenue just covers all of the firm s economic cost Economic loss occurs when revenue fails to cover the firm s economic cost Economic profit occurs when revenue more than covers the firm s economic cost
12 Key Assumptions in Perfect Competition
13 Key Assumptions in Perfect Competition The Demand Curve Facing the Firm Since the firm is a price taker, the price to the firm for each unit remains the same no matter how much the firm sells. Perfectly Elastic since consumers are willing to buy as much as the firm is willing to sell at the going market price. Horizontal at the market price
14 Key Assumptions in Perfect Marginal Revenue and Average Revenue Since the firm receives the market price for each unit sold, and this market price does not change, the firm s marginal revenue (MR) and average revenue (AR) curves are also horizontal at the market price. Competition
15 Key Assumptions in Perfect Marginal Revenue Marginal revenue tells us how total revenue changes as we sell an additional unit. Marginal revenue represents the slope of the total revenue curve. Since MR is positive and constant, the total revenue (TR) curve is increasing at a constant rate. Competition
16 Selecting the Optimal Output Level Total Revenue Total Cost Approach Compare the total revenue and total cost schedules and find the level of output that either maximizes the firm s profits or minimizes its loss.
17 Selecting the Optimal Output Level Total Revenue Total Cost Approach
18 Selecting the Optimal Output Level Total Revenue Total Cost Approach Graphically, find the output level that maximizes the distance between the total revenue curve and the total cost curve.
19 Selecting the Optimal Output Level Marginal Revenue en e Marginal Cost Approach Marginal revenue is the revenue the firm receives from selling an additional unit. Marginal cost is the cost the firm incurs by producing an additional unit. If marginal revenue exceeds marginal cost it is worthwhile for the firm to produce and sell an additional unit.
20 Selecting the Optimal Output Level Marginal Revenue en e Marginal Cost Approach MR=MC MC Rule A firm that wants to maximize its profit (or minimize its loss) should produce a level of output at which the additional revenue received from the last unit is equal to the additional cost of producing that unit. In short, MR=MC. Applies to any firm that wishes to maximize profit. For the perfectly competitive firm, the rule may be restated, P=MC. Why?
21 Selecting the Optimal Output Level Marginal Revenue en e Marginal Cost Approach
22 Selecting the Optimal Output Level Marginal Revenue en e Marginal Cost Approach Graphically, find the output at which MR=MC. Label this Q* Profit=TR TC =Q* P Q* AC =Q* (P - AC) =Rectangle DABC
23 Economic Profit, Normal Profit, Loss, and Shutdown In the following table, the market price has fallen to $58. How much should the firm produce in order to maximize profits? Why? Should the firm shut down and produce nothing?
24 Economic Profit, Normal Profit, Loss, and Shutdown
25 Economic Profit, Normal Profit, Loss, and Shutdown
26 Economic Profit, Normal Profit, Graphically. The firm incurs a loss. At the optimum output level price is below average cost. However, since price is greater than average variable cost, the firm is better off producing in the short run. Why? Loss, and Shutdown
27 Economic Profit, Normal Profit, Contribution Margin The amount by which total revenue exceeds total variable cost. = TR TVC If the contribution margin is positive, the firm should continue to produce in the short run. Loss, and Shutdown
28 Economic Profit, Normal Profit, Should the firm always operate at a loss in the short run? In the graph, the price has fallen to $50. How much output should the firm produce? Why? Loss, and Shutdown
29 Economic Profit, Normal Profit, Loss, and Shutdown The shutdown point is the lowest price at which the firm would still produce. At the shutdown point, the price is equal to the minimum point on the AVC. If the price falls below the shutdown point, revenues fail to cover the fixed costs and the variable costs. The contribution margin is negative. The firm would be better off if it shut down and just paid its fixed costs.
30 Economic Profit, Normal Profit, What are the firm s profits in the graph at the right? Normal Profits TR = TC Loss, and Shutdown
31 The Competitive Market in the Long Run In the long run, the price in the competitive market will settle at the point where firms earn a normal profit. Economic profit invites entry of new firms (why?) which shifts the supply curve to the right, puts downward pressure on price and reduces profits.
32 The Competitive Market in the Long Run
33 The Competitive Market in the Long Run Economic loss encourages exit of existing firms (why?) which shifts the supply curve to the left, puts upward pressure on price and increases profits.
34 The Competitive Market in the Long Run
35 Pricing and Output Decisions in Monopoly Markets A monopoly market consists of one firm. The firm is the market. Power to establish any price it wants. The firm s ability to set price is limited it by the demand curve for its product, and din particular, the price elasticity i of demand.
36 Pricing and Output Decisions in In the graph, assume Demand is linear which implies that MR is linear and twice as steep. MC is constant. How much should the firm produce to maximize profit? Monopoly Markets
37 Pricing and Output Decisions in In the graph, assume Demand is linear which implies that MR is linear and dtwice as steep. Diminishing returns. How much should the firm produce to maximize profit? Monopoly Markets
38 Pricing and Output Decisions in Monopoly Markets Using the information in the following table, determine how much the firm should produce in order to maximize profits.
39 Pricing and Output Decisions in Monopoly Markets
40 Pricing and Output Decisions in Monopoly Markets
41 Pricing and Output Decisions in Graphically: Set output where MR=MC At this output, read the price to set off of the demand curve. Profits = rectangle ABCD Monopoly Markets
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