🗊Презентация Firms in competitive markets. (Lecture 14)

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Firms in competitive markets. (Lecture 14), слайд №1Firms in competitive markets. (Lecture 14), слайд №2Firms in competitive markets. (Lecture 14), слайд №3Firms in competitive markets. (Lecture 14), слайд №4Firms in competitive markets. (Lecture 14), слайд №5Firms in competitive markets. (Lecture 14), слайд №6Firms in competitive markets. (Lecture 14), слайд №7Firms in competitive markets. (Lecture 14), слайд №8Firms in competitive markets. (Lecture 14), слайд №9Firms in competitive markets. (Lecture 14), слайд №10Firms in competitive markets. (Lecture 14), слайд №11Firms in competitive markets. (Lecture 14), слайд №12Firms in competitive markets. (Lecture 14), слайд №13Firms in competitive markets. (Lecture 14), слайд №14Firms in competitive markets. (Lecture 14), слайд №15Firms in competitive markets. (Lecture 14), слайд №16Firms in competitive markets. (Lecture 14), слайд №17Firms in competitive markets. (Lecture 14), слайд №18Firms in competitive markets. (Lecture 14), слайд №19Firms in competitive markets. (Lecture 14), слайд №20Firms in competitive markets. (Lecture 14), слайд №21Firms in competitive markets. (Lecture 14), слайд №22Firms in competitive markets. (Lecture 14), слайд №23Firms in competitive markets. (Lecture 14), слайд №24Firms in competitive markets. (Lecture 14), слайд №25Firms in competitive markets. (Lecture 14), слайд №26Firms in competitive markets. (Lecture 14), слайд №27Firms in competitive markets. (Lecture 14), слайд №28Firms in competitive markets. (Lecture 14), слайд №29Firms in competitive markets. (Lecture 14), слайд №30Firms in competitive markets. (Lecture 14), слайд №31Firms in competitive markets. (Lecture 14), слайд №32Firms in competitive markets. (Lecture 14), слайд №33Firms in competitive markets. (Lecture 14), слайд №34Firms in competitive markets. (Lecture 14), слайд №35Firms in competitive markets. (Lecture 14), слайд №36Firms in competitive markets. (Lecture 14), слайд №37Firms in competitive markets. (Lecture 14), слайд №38Firms in competitive markets. (Lecture 14), слайд №39Firms in competitive markets. (Lecture 14), слайд №40Firms in competitive markets. (Lecture 14), слайд №41Firms in competitive markets. (Lecture 14), слайд №42Firms in competitive markets. (Lecture 14), слайд №43Firms in competitive markets. (Lecture 14), слайд №44Firms in competitive markets. (Lecture 14), слайд №45Firms in competitive markets. (Lecture 14), слайд №46Firms in competitive markets. (Lecture 14), слайд №47
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14 Firms in Competitive Markets
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14 Firms in Competitive Markets

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WHAT IS A COMPETITIVE MARKET? A perfectly competitive market has the following characteristics: There are many buyers and sellers in the market. The goods offered by the various sellers are largely the same. Firms can freely enter or exit the market.
Описание слайда:
WHAT IS A COMPETITIVE MARKET? A perfectly competitive market has the following characteristics: There are many buyers and sellers in the market. The goods offered by the various sellers are largely the same. Firms can freely enter or exit the market.

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WHAT IS A COMPETITIVE MARKET? As a result of its characteristics, the perfectly competitive market has the following outcomes: The actions of any single buyer or seller in the market have a negligible impact on the market price. Each buyer and seller takes the market price as given.
Описание слайда:
WHAT IS A COMPETITIVE MARKET? As a result of its characteristics, the perfectly competitive market has the following outcomes: The actions of any single buyer or seller in the market have a negligible impact on the market price. Each buyer and seller takes the market price as given.

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WHAT IS A COMPETITIVE MARKET? A competitive market has many buyers and sellers trading identical products so that each buyer and seller is a price taker. Buyers and sellers must accept the price determined by the market.
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WHAT IS A COMPETITIVE MARKET? A competitive market has many buyers and sellers trading identical products so that each buyer and seller is a price taker. Buyers and sellers must accept the price determined by the market.

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The Revenue of a Competitive Firm Total revenue for a firm is the selling price times the quantity sold. TR = (P  Q)
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The Revenue of a Competitive Firm Total revenue for a firm is the selling price times the quantity sold. TR = (P  Q)

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The Revenue of a Competitive Firm Total revenue is proportional to the amount of output.
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The Revenue of a Competitive Firm Total revenue is proportional to the amount of output.

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The Revenue of a Competitive Firm Average revenue tells us how much revenue a firm receives for the typical unit sold. Average revenue is total revenue divided by the quantity sold.
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The Revenue of a Competitive Firm Average revenue tells us how much revenue a firm receives for the typical unit sold. Average revenue is total revenue divided by the quantity sold.

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The Revenue of a Competitive Firm In perfect competition, average revenue equals the price of the good.
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The Revenue of a Competitive Firm In perfect competition, average revenue equals the price of the good.

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The Revenue of a Competitive Firm Marginal revenue is the change in total revenue from an additional unit sold. MR =TR/ Q
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The Revenue of a Competitive Firm Marginal revenue is the change in total revenue from an additional unit sold. MR =TR/ Q

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The Revenue of a Competitive Firm For competitive firms, marginal revenue equals the price of the good.
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The Revenue of a Competitive Firm For competitive firms, marginal revenue equals the price of the good.

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Table 1 Total, Average, and Marginal Revenue for a Competitive Firm
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Table 1 Total, Average, and Marginal Revenue for a Competitive Firm

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PROFIT MAXIMIZATION AND THE COMPETITIVE FIRM’S SUPPLY CURVE The goal of a competitive firm is to maximize profit. This means that the firm will want to produce the quantity that maximizes the difference between total revenue and total cost.
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PROFIT MAXIMIZATION AND THE COMPETITIVE FIRM’S SUPPLY CURVE The goal of a competitive firm is to maximize profit. This means that the firm will want to produce the quantity that maximizes the difference between total revenue and total cost.

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Table 2 Profit Maximization: A Numerical Example
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Table 2 Profit Maximization: A Numerical Example

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Figure 1 Profit Maximization for a Competitive Firm
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Figure 1 Profit Maximization for a Competitive Firm

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PROFIT MAXIMIZATION AND THE COMPETITIVE FIRM’S SUPPLY CURVE Profit maximization occurs at the quantity where marginal revenue equals marginal cost.
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PROFIT MAXIMIZATION AND THE COMPETITIVE FIRM’S SUPPLY CURVE Profit maximization occurs at the quantity where marginal revenue equals marginal cost.

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PROFIT MAXIMIZATION AND THE COMPETITIVE FIRM’S SUPPLY CURVE When MR > MC - increase Q When MR < MC - decrease Q When MR = MC - Profit is maximized.
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PROFIT MAXIMIZATION AND THE COMPETITIVE FIRM’S SUPPLY CURVE When MR > MC - increase Q When MR < MC - decrease Q When MR = MC - Profit is maximized.

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Figure 2 Marginal Cost as the Competitive Firm’s Supply Curve
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Figure 2 Marginal Cost as the Competitive Firm’s Supply Curve

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The Firm’s Short-Run Decision to Shut Down A shutdown refers to a short-run decision not to produce anything during a specific period of time because of current market conditions. Exit refers to a long-run decision to leave the market.
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The Firm’s Short-Run Decision to Shut Down A shutdown refers to a short-run decision not to produce anything during a specific period of time because of current market conditions. Exit refers to a long-run decision to leave the market.

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The Firm’s Short-Run Decision to Shut Down The firm considers its sunk costs when deciding to exit, but ignores them when deciding whether to shut down. Sunk costs are costs that have already been committed and cannot be recovered.
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The Firm’s Short-Run Decision to Shut Down The firm considers its sunk costs when deciding to exit, but ignores them when deciding whether to shut down. Sunk costs are costs that have already been committed and cannot be recovered.

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The Firm’s Short-Run Decision to Shut Down The firm shuts down if the revenue it gets from producing is less than the variable cost of production. Shut down if TR < VC Shut down if TR/Q < VC/Q Shut down if P < AVC
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The Firm’s Short-Run Decision to Shut Down The firm shuts down if the revenue it gets from producing is less than the variable cost of production. Shut down if TR < VC Shut down if TR/Q < VC/Q Shut down if P < AVC

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Figure 3 The Competitive Firm’s Short Run Supply Curve
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Figure 3 The Competitive Firm’s Short Run Supply Curve

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The Firm’s Short-Run Decision to Shut Down The portion of the marginal-cost curve that lies above average variable cost is the competitive firm’s short-run supply curve.
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The Firm’s Short-Run Decision to Shut Down The portion of the marginal-cost curve that lies above average variable cost is the competitive firm’s short-run supply curve.

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The Firm’s Long-Run Decision to Exit or Enter a Market In the long run, the firm exits if the revenue it would get from producing is less than its total cost. Exit if TR < TC Exit if TR/Q < TC/Q Exit if P < ATC
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The Firm’s Long-Run Decision to Exit or Enter a Market In the long run, the firm exits if the revenue it would get from producing is less than its total cost. Exit if TR < TC Exit if TR/Q < TC/Q Exit if P < ATC

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The Firm’s Long-Run Decision to Exit or Enter a Market A firm will enter the industry if such an action would be profitable. Enter if TR > TC Enter if TR/Q > TC/Q Enter if P > ATC
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The Firm’s Long-Run Decision to Exit or Enter a Market A firm will enter the industry if such an action would be profitable. Enter if TR > TC Enter if TR/Q > TC/Q Enter if P > ATC

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Figure 4 The Competitive Firm’s Long-Run Supply Curve
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Figure 4 The Competitive Firm’s Long-Run Supply Curve

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THE SUPPLY CURVE IN A COMPETITIVE MARKET The competitive firm’s long-run supply curve is the portion of its marginal-cost curve that lies above average total cost.
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THE SUPPLY CURVE IN A COMPETITIVE MARKET The competitive firm’s long-run supply curve is the portion of its marginal-cost curve that lies above average total cost.

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Figure 4 The Competitive Firm’s Long-Run Supply Curve
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Figure 4 The Competitive Firm’s Long-Run Supply Curve

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THE SUPPLY CURVE IN A COMPETITIVE MARKET Short-Run Supply Curve The portion of its marginal cost curve that lies above average variable cost. Long-Run Supply Curve The marginal cost curve above the minimum point of its average total cost curve.
Описание слайда:
THE SUPPLY CURVE IN A COMPETITIVE MARKET Short-Run Supply Curve The portion of its marginal cost curve that lies above average variable cost. Long-Run Supply Curve The marginal cost curve above the minimum point of its average total cost curve.

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Figure 5 Profit as the Area between Price and Average Total Cost
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Figure 5 Profit as the Area between Price and Average Total Cost

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Figure 5 Profit as the Area between Price and Average Total Cost
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Figure 5 Profit as the Area between Price and Average Total Cost

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THE SUPPLY CURVE IN A COMPETITIVE MARKET Market supply equals the sum of the quantities supplied by the individual firms in the market.
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THE SUPPLY CURVE IN A COMPETITIVE MARKET Market supply equals the sum of the quantities supplied by the individual firms in the market.

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The Short Run: Market Supply with a Fixed Number of Firms For any given price, each firm supplies a quantity of output so that its marginal cost equals price. The market supply curve reflects the individual firms’ marginal cost curves.
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The Short Run: Market Supply with a Fixed Number of Firms For any given price, each firm supplies a quantity of output so that its marginal cost equals price. The market supply curve reflects the individual firms’ marginal cost curves.

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Figure 6 Market Supply with a Fixed Number of Firms
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Figure 6 Market Supply with a Fixed Number of Firms

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The Long Run: Market Supply with Entry and Exit Firms will enter or exit the market until profit is driven to zero. In the long run, price equals the minimum of average total cost. The long-run market supply curve is horizontal at this price.
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The Long Run: Market Supply with Entry and Exit Firms will enter or exit the market until profit is driven to zero. In the long run, price equals the minimum of average total cost. The long-run market supply curve is horizontal at this price.

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Figure 7 Market Supply with Entry and Exit
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Figure 7 Market Supply with Entry and Exit

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The Long Run: Market Supply with Entry and Exit At the end of the process of entry and exit, firms that remain must be making zero economic profit. The process of entry and exit ends only when price and average total cost are driven to equality. Long-run equilibrium must have firms operating at their efficient scale.
Описание слайда:
The Long Run: Market Supply with Entry and Exit At the end of the process of entry and exit, firms that remain must be making zero economic profit. The process of entry and exit ends only when price and average total cost are driven to equality. Long-run equilibrium must have firms operating at their efficient scale.

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Why Do Competitive Firms Stay in Business If They Make Zero Profit? Profit equals total revenue minus total cost. Total cost includes all the opportunity costs of the firm. In the zero-profit equilibrium, the firm’s revenue compensates the owners for the time and money they expend to keep the business going.
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Why Do Competitive Firms Stay in Business If They Make Zero Profit? Profit equals total revenue minus total cost. Total cost includes all the opportunity costs of the firm. In the zero-profit equilibrium, the firm’s revenue compensates the owners for the time and money they expend to keep the business going.

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A Shift in Demand in the Short Run and Long Run An increase in demand raises price and quantity in the short run. Firms earn profits because price now exceeds average total cost.
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A Shift in Demand in the Short Run and Long Run An increase in demand raises price and quantity in the short run. Firms earn profits because price now exceeds average total cost.

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Figure 8 An Increase in Demand in the Short Run and Long Run
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Figure 8 An Increase in Demand in the Short Run and Long Run

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Figure 8 An Increase in Demand in the Short Run and Long Run
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Figure 8 An Increase in Demand in the Short Run and Long Run

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Figure 8 An Increase in Demand in the Short Run and Long Run
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Figure 8 An Increase in Demand in the Short Run and Long Run

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Why the Long-Run Supply Curve Might Slope Upward Some resources used in production may be available only in limited quantities. Firms may have different costs.
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Why the Long-Run Supply Curve Might Slope Upward Some resources used in production may be available only in limited quantities. Firms may have different costs.

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Why the Long-Run Supply Curve Might Slope Upward Marginal Firm The marginal firm is the firm that would exit the market if the price were any lower.
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Why the Long-Run Supply Curve Might Slope Upward Marginal Firm The marginal firm is the firm that would exit the market if the price were any lower.

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Summary Because a competitive firm is a price taker, its revenue is proportional to the amount of output it produces. The price of the good equals both the firm’s average revenue and its marginal revenue.
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Summary Because a competitive firm is a price taker, its revenue is proportional to the amount of output it produces. The price of the good equals both the firm’s average revenue and its marginal revenue.

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Summary To maximize profit, a firm chooses the quantity of output such that marginal revenue equals marginal cost. This is also the quantity at which price equals marginal cost. Therefore, the firm’s marginal cost curve is its supply curve.
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Summary To maximize profit, a firm chooses the quantity of output such that marginal revenue equals marginal cost. This is also the quantity at which price equals marginal cost. Therefore, the firm’s marginal cost curve is its supply curve.

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Summary In the short run, when a firm cannot recover its fixed costs, the firm will choose to shut down temporarily if the price of the good is less than average variable cost. In the long run, when the firm can recover both fixed and variable costs, it will choose to exit if the price is less than average total cost.
Описание слайда:
Summary In the short run, when a firm cannot recover its fixed costs, the firm will choose to shut down temporarily if the price of the good is less than average variable cost. In the long run, when the firm can recover both fixed and variable costs, it will choose to exit if the price is less than average total cost.

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Summary In a market with free entry and exit, profits are driven to zero in the long run and all firms produce at the efficient scale. Changes in demand have different effects over different time horizons. In the long run, the number of firms adjusts to drive the market back to the zero-profit equilibrium.
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Summary In a market with free entry and exit, profits are driven to zero in the long run and all firms produce at the efficient scale. Changes in demand have different effects over different time horizons. In the long run, the number of firms adjusts to drive the market back to the zero-profit equilibrium.

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