Suppose the book-printing industry is competitive and begins...

Suppose the book-printing industry is competitive and begins in a long-run equilibrium. a. Draw a diagram showing the average total cost, marginal cost, marginal revenue, and supply curve of the typical firm in the industry. b. Hi-Tech Printing Company invents a new process that sharply reduces the cost of printing books. What happens to Hi-Tech's profits and to the price of books in the short run when HiTech's patent prevents other firms from using the new technology? c. What happens in the long run when the patent expires and other firms are free to use the technology?

Suppose the book-printing industry is competitive and begins in a long-run equilibrium.
a. Draw a diagram showing the average total cost, marginal cost, marginal revenue, and supply curve of the typical firm in the industry.
b. Hi-Tech Printing Company invents a new process that sharply reduces the cost of printing books. What happens to Hi-Tech's profits and to the price of books in the short run when HiTech's patent prevents other firms from using the new technology?
c. What happens in the long run when the patent expires and other firms are free to use the technology?

Key Concepts

Short-Run and Long-Run Market Adjustments

The distinction between short-run and long-run adjustments in the market is crucial. In the short run, a firm with a technological advantage can earn abnormal profits due to temporary cost reductions and limited competition. However, once the patent expires and other firms adopt the new technology, increased competition drives down the market price and erodes excess profits, returning the industry to a new long-run equilibrium.

Temporary Technological Advantage

When a firm like Hi-Tech Printing obtains a cost-reducing technology and holds a patent, it gains a temporary monopoly power within a competitive industry. This innovation lowers production costs and boosts profits in the short run by providing the firm with a competitive edge over others who do not have access to the technology.

Supply Curve

The supply curve of a competitive firm is often derived from its marginal cost curve above the average variable cost. This curve indicates the quantity of goods a firm is willing to supply at different price levels. It is a key tool for analyzing how changes in production costs or technology affect the market supply and eventual equilibrium price.

Marginal Revenue and Price

In a perfectly competitive market, the marginal revenue (MR) curve is horizontal and equal to the market price because firms are price takers. This means that each unit sold adds a constant amount to a firm’s revenue, and the decision to produce additional units is based on the comparison between marginal revenue and marginal cost.

Cost Curves

Cost curves like the average total cost (ATC) and marginal cost (MC) curves are critical tools for understanding firm behavior. The ATC curve shows the per-unit cost of production, while the MC curve represents the additional cost incurred when producing one more unit. The intersection of these curves helps determine the level of output where production is most cost-efficient and profits are optimized in a competitive framework.

Long-Run Competitive Equilibrium

This concept involves a state in a perfectly competitive market where firms earn zero economic profit. In long-run equilibrium, firms adjust their production so that price equals both marginal cost and the minimum average total cost. This ensures there are no incentives for entry or exit from the industry, and resources are allocated efficiently across firms.

Transcript

00:01 Alright, so first we will draw a diagram concerning a few curves with a book printing industry that is competitive and begins in long -run equilibrium.

00:11 So first we'll draw our diagram here with price and quantity.

00:16 So first we'll draw our marginal cost curve.

00:20 Marginal cost curve at first slopes downwards due to efficiency and collaboration, but then the law of diminishing returns.

00:31 Dictates that the marginal cost curve will slope upwards as quantity increases.

00:37 Then we'll draw our average total cost curve.

00:40 Starts in the middle with average fixed costs being high and then decreases as the marginal cost curve brings this curve down.

00:49 Then the average total cost curve will hit its minimum point as the marginal cost curve and the average total cost curve intercept and the average total cost curve will then increase as marginal cost brings it up.

01:04 Next, we will draw our marginal revenue curve.

01:08 Our marginal revenue curve is something that we actually know due to our knowledge that the book printing industry is competitive and is in longer an equilibrium.

01:19 If these two things are true, then we know that profits of a firm in this market are equal to zero.

01:26 And if the profits of the firm of a profit maximizing firm are equal to zero, then we know that the marginal revenue has to be equal to the lowest point of average total cost.

01:40 So marginal revenue or price in this market is right here.

01:46 Our final thing we need to figure out is the supply curve of a typical firm in this industry...

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