What You Need to Know About Monopolistic Competition

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Reviewed by Omotolani Ajileye

Monopolistic competition is a market structure where many firms sell products that are similar but slightly different. It blends elements of a monopoly (pricing power via product differentiation) and perfect competition (many sellers and low entry barriers). 

Similarities And Differences Between Monopolistic Competition And Perfect Competition

Similarities

1. Many Buyers and Sellers Exist

Both market structures have many buyers and many sellers. Because of this, no single buyer or seller has enough power to control the market. Each firm acts independently, and the overall market outcome is shaped by the combined actions of all participants.

2. Firms Seek to Maximise Profit

According to Ahmed et al. (2020), firms in both monopolistic competition and perfect competition aim to maximise profit. They adjust their output levels based on cost and revenue conditions, producing at a level where they can earn the highest possible return, even though long-run profits may differ.

3. Freedom of Entry and Exit Exists

In both markets, firms are generally free to enter or leave the industry. If profits are attractive, new firms join, and if losses persist, some firms exit. This movement helps push long-run profits towards normal levels in both structures.

4. Competition is Present

Both structures involve competition among firms. In perfect competition, competition is based mainly on price, while in monopolistic competition it includes price, quality, branding, and advertising. In both cases, firms compete to attract consumers.

5. Many sellers offering products to consumers

In both market types, consumers have access to several sellers supplying goods or services. This availability ensures that buyers are not dependent on a single supplier and can choose from different firms in the market.

Differences

1. A market structure where there are many sellers selling similar goods to the buyers is perfect competition. A market structure where there are numerous sellers selling close substitute goods to the buyers is monopolistic competition.

2. In perfect competition, the product offered is standardised, whereas in monopolistic competition, product differentiation is present.

3. In perfect competition, the demand and supply forces determine the price for the whole industry, and every firm sells its product at that price. In monopolistic competition, every firm offers products at its own price.

4. The slope of the demand curve is horizontal, which shows perfectly elastic demand. On the other hand, in monopolistic competition, the demand curve is downward sloping, which represents the relatively elastic demand.

5. Average revenue (AR) and marginal revenue (MR) curves coincide with each other in perfect competition. Conversely, in monopolistic competition, average revenue is greater than the marginal revenue, i.e. to increase sales, the firm has to lower its price.

6. Perfect competition is an imaginary situation which does not exist in reality. Unlike monopolistic competition, which exists in reality.

Barriers That Can Prevent The Emergence Of Competitive Firms

1. High Start-Up Capital

Many industries require very large initial investment before a firm can begin operations (Olsen & Tomlin, 2020). Costs such as machinery, buildings, technology, and working capital may be too high for new entrants to afford. When only a few firms are able to raise such capital, entry into the market becomes restricted. This limits competition and allows existing firms to maintain their dominance.

2. Government Regulations

Governments may restrict entry into certain industries through licensing, permits, quotas, or legal restrictions. These rules are often meant to ensure safety, quality control, or national interest, but they can also limit the number of firms allowed to operate. As a result, competition is reduced because only approved firms can legally participate in the market.

3. Patents and Copyrights

Patents and copyrights give exclusive legal rights to individuals or firms over inventions, products, or creative works. During the period of protection, other firms are not allowed to produce or sell the same product. This creates a temporary monopoly, preventing competitors from entering the market and copying the innovation.

4. Control of Raw Materials

When a firm has exclusive access to essential raw materials, it becomes difficult for new firms to enter the industry. If key inputs are owned or controlled by one company or a small group, competitors cannot easily produce similar goods. This gives existing firms strong market power and reduces competition.

5. Brand Loyalty

Strong customer preference for an existing brand can discourage new firms from entering a market. Consumers may continue buying established products due to trust, quality perception, or habit. New firms find it difficult and expensive to convince customers to switch, which reduces their chances of surviving in the market.

6. Economies of Scale

Large firms often enjoy lower average costs as they increase production. This makes it difficult for small or new firms to compete on price. Since established firms can sell more cheaply, new entrants may struggle to survive, leading to reduced competition and possible market dominance by a few large firms.

7. High Advertising Costs

In some industries, success depends heavily on advertising and promotion. Established firms usually have large budgets for marketing, making their products more visible to consumers. New firms may not afford similar levels of advertising, making it hard for them to attract customers and compete effectively.

8. Technical Know-How Requirements

Certain industries require advanced skills, specialised knowledge, or complex technology. Firms without access to such expertise find it difficult to enter and operate successfully. When knowledge and technology are concentrated in a few firms, competition is limited, and barriers to entry remain high.

Price And Quantity Determination Under Perfect Competition

Under perfect competition, the price of a beneficial is determined by the interaction of market demand and market supply. The equilibrium price is the point where the quantity demanded by consumers equals the quantity supplied by producers. 

At this point, there is no excess supply or excess demand. Individual firms in a perfectly competitive market are price takers, meaning they accept the market price as given because no single firm is large enough to influence it. Each firm can sell any quantity of output at this prevailing market price, and therefore its demand curve is perfectly elastic.

The quantity produced by each firm is determined by the profit-maximising rule where marginal cost equals marginal revenue (MC = MR). Since the price is constant in perfect competition, marginal revenue is equal to price (P = MR). 

Firms will increase output as long as marginal revenue is greater than marginal cost and will stop at the level where they are equal. In the long run, entry and exit of firms ensure that abnormal profits are eliminated, and firms produce at the lowest point of their average cost curve, resulting in efficient allocation of resources and normal profit only.

Price And Quantity Determination Under Monopoly

Under monopoly, price and output are determined by the behaviour of a single seller who has full control over the supply of a product with no close substitutes. Unlike in perfect competition where firms are price takers, a monopolist is a price maker. 

However, the monopolist cannot charge any price he wishes without limit because demand still determines how much consumers are willing and able to buy. To maximise profit, the monopolist chooses the level of output where marginal revenue (MR) equals marginal cost (MC). This condition gives the profit-maximising quantity of output.

After determining the profit-maximising output, the monopolist sets the price by referring to the demand curve. At this output level, the corresponding price on the demand curve is the price charged to consumers. 

Since the demand curve is usually downward sloping, a higher output can only be sold at a lower price, and a lower output can be sold at a higher price. This means the monopolist often restricts output to keep prices high, leading to higher prices and lower quantities compared to a perfectly competitive market.

Summary

• Monopoly is a market structure with only one seller and no close substitutes.

• Monopoly may be natural (due to cost advantages) or legal (due to government protection or patents).

• A monopolist is a price maker and controls both price and output in the market.

• Monopoly power can arise from factors such as patents, high capital requirements, and control of resources.

• Monopoly can lead to economies of scale and stable supply but may also result in high prices and reduced consumer choice.

• Monopolistic competition is similar to perfect competition but involves product differentiation and some degree of price control by firms.

• Firms in monopolistic competition engage in advertising and compete on product features.

• Barriers to competition include high startup costs, government regulations, patents, strong brand loyalty, and economies of scale.

• Under perfect competition, equilibrium price is determined where demand equals supply.

• Firms under perfect competition are price takers and adjust output to the market price.

• Under monopoly, the firm maximises profit where marginal revenue equals marginal cost (MR = MC).

• The monopolist sets output first and then determines the price consumers are willing to pay.

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