Explain how each of the assumptions of perfect competition contributes to the fact that all decision makers in perfect competition are price takers.If the assumptions of perfect competition are not likely to be met in the real world, how can the model be of any use?Explain the difference between marginal revenue, average revenue, and price in perfect competition.Suppose the only way a firm can increase its sales is to lower its price. Is this a perfectly competitive firm? Why or why not?The graph below provides revenue and cost information for a perfectly competitive firm producing paper clips.1$1,000$1,500$5002$2,000$2,000$5003$3,000$2,600$5004$4,000$3,900$5005$5,000$5,000$500How much are total fixed costs?About how much are total variable costs if 5,000 paper clips are produced?What is the price of a paper clip?What is the average revenue from producing paper clips?What is the marginal revenue of producing paper clips?Over what output range will this firm earn economic profits?Over what output range will this firm incur economic losses?What is the slope of the total revenue curve?What is the slope of the total cost curve at the profit-maximizing number of paper clips per hour?At about how many paper clips per hour do economic profits seem to be at a maximum?Suppose rocking-chair manufacturing is a perfectly competitive industry in which there are 1,000 identical firms. Each firm’s total cost is related to output per day as follows:0$5005$2,2001$1,0006$2,7002$1,3007$3,3003$1,5008$4,4004$1,800Prepare a table that shows total variable cost, average total cost, and marginal cost at each level of output.Plot the average total cost, average variable cost, and marginal cost curves for a single firm (remember that values for marginal cost are plotted at the midpoint of the respective intervals).What is the firm’s supply curve? How many chairs would the firm produce at prices of $350, $450, $550, and $650? (In computing quantities, assume that a firm produces a certain number of completed chairs each day; it does not produce fractions of a chair on any one day.)Suppose the demand curve in the market for rocking chairs is given by the following table:$6505,000$4507,000$5506,000$3508,000Plot the market demand curve for chairs. Compute and plot the market supply curve, using the information you obtained for a single firm in part (c). What is the equilibrium price? The equilibrium quantity?Given your solution in part (d), plot the total revenue and total cost curves for a single firm. Does your graph correspond to your solution in part (c)? Explain.The following table shows the total output, total revenue, total variable cost, and total fixed cost of a firm. What level of output should the firm produce? Should it shut down? Should it exit the industry? Explain.1$1,000$1,500$5002$2,000$2,000$5003$3,000$2,600$5004$4,000$3,900$5005$5,000$5,000$500
The Correct Answer and Explanation is :
n a perfectly competitive market, several key assumptions ensure that all participants are price takers:
- Numerous Buyers and Sellers: he market comprises a large number of buyers and sellers, each holding an insignificant share of the market. Consequently, no single participant can influence the market price; they must accept the prevailing price.citeturn0search0
- Homogeneous Products: he goods offered are identical across sellers, leaving buyers indifferent about the source. This uniformity means sellers cannot charge a premium, reinforcing their role as price takers.citeturn0search0
- Perfect Information: ll market participants have complete knowledge of prices and product characteristics. This transparency ensures that any attempt by a seller to raise prices above the market level would result in a loss of customers to competitors.citeturn0search0
- Free Entry and Exit: here are no barriers preventing firms from entering or exiting the market. If existing firms attempt to set prices above equilibrium, new firms can enter, increase supply, and drive prices back down, maintaining the price-taking environment.citeturn0search0
hile perfect competition is rare in reality, the model serves as a valuable benchmark.t provides insights into how markets function under ideal conditions, helping economists and policymakers understand the effects of market structures and the importance of competition.eviations from this model highlight areas where interventions might be necessary to promote efficiency and consumer welfare.
n perfect competition, the relationship between price, average revenue (AR), and marginal revenue (MR) is straightforward:
- Price (P): he fixed market price at which goods are sold.
- Average Revenue (AR): otal revenue divided by the quantity sold (AR = TR/Q). In perfect competition, AR equals the market price.
- Marginal Revenue (MR): he additional revenue gained from selling one more unit. For perfectly competitive firms, MR also equals the market price, as each additional unit sold adds the same amount to total revenue.citeturn0search1
f a firm must lower its price to increase sales, it indicates a downward-sloping demand curve, characteristic of imperfect competition.n perfect competition, firms can sell any quantity at the prevailing market price without reducing it, due to the perfectly elastic demand they face.citeturn0search4
egarding the provided data for a perfectly competitive firm producing paper clips:
- Total Fixed Costs (TFC): hese remain constant regardless of output. Observing the data, TFC is $500.
- Total Variable Costs (TVC) at 5,000 units: VC can be calculated by subtracting TFC from Total Cost (TC). At 5,000 units, TC is $5,000, so TVC = $5,000 – $500 = $4,500.
- Price per Paper Clip: n perfect competition, Price (P) equals Average Revenue (AR), which is Total Revenue (TR) divided by Quantity (Q). At any output level, P = TR/Q. For instance, at 5,000 units, P = $5,000 / 5,000 = $1 per paper clip.
- Average Revenue (AR): s noted, AR equals the market price, which is $1 per paper clip.
- Marginal Revenue (MR): n perfect competition, MR equals the market price, so MR is also $1 per paper clip.
- Economic Profits and Losses:
- Economic Profits: ccur when Total Revenue (TR) exceeds Total Cost (TC). From the data, this happens at outputs of 1,000 and 2,000 paper clips. – Economic Losses: ccur when TC exceeds TR. This happens at outputs of 3,000, 4,000, and 5,000 paper clips.
- Slope of Total Revenue Curve: he slope is determined by the change in TR over the change in Q (ΔTR/ΔQ). In this case, the slope is constant at $1, reflecting the constant price per unit.
- Slope of Total Cost Curve at Profit-Maximizing Output: he slope of the TC curve is the Marginal Cost (MC). To maximize profit, firms produce where MR equals MC. Given MR is $1, the firm should produce where MC is also $1.
- Output Level for Maximum Economic Profit: conomic profits appear to be highest at an output of 2,000 paper clips, where the difference between TR and TC is greatest.
or the rocking-chair manufacturing industry with 1,000 identical firms, analyzing the cost data: - Total Variable Cost (TVC): alculated by subtracting Total Fixed Cost (TFC) from Total Cost (TC).
- Average Total Cost (ATC): TC = TC / Quantity.
- Marginal Cost (MC): he change in TC divided by the change in Quantity (ΔTC/ΔQ).
lotting the ATC, AVC, and MC curves provides a visual representation of costs at different output levels.he firm’s supply curve corresponds to the portion of the MC curve above the AVC.t prices of $350, $450, $550, and $650, the firm would produce quantities where these prices intersect the MC curve, ensuring that price covers AVC to continue production.
onsidering the market demand curve provided, plotting it alongside the market supply curve (derived from the individual firm’s supply curve multiplied by 1,000 firms) will reveal the equilibrium price and quantity.t this equilibrium, individual firms can assess their TR and TC to determine profitability.
n summary