独占的競争

Monopolistic competition occupies a middle ground between perfect competition and monopoly. Unlike perfect competition, firms sell differentiated products and have some pricing power. Unlike monopoly, many firms exist with low entry barriers, preventing any single firm from controlling the market. This structure combines competitive pressure with limited individual market power.

Firms differentiate products through branding, quality, design, features, and customer service. Each firm offers a product similar to competitors but distinct enough to justify different pricing. This differentiation gives firms some control over price, allowing them to set prices above marginal cost. Differentiated products under monopolistic competition benefit consumers by providing variety and choice.

Demand is relatively elastic because consumers have many close substitutes available. If a firm raises prices too high, customers can easily switch to competitors offering similar products. This availability of alternatives limits each firm's pricing power, forcing firms to balance price increases with the risk of losing customers to rival providers.

Advertising is a key non-price competition strategy firms use to differentiate products and attract customers. However, firms must balance advertising benefits against increased costs, as raising prices to cover advertising expenses risks losing price-sensitive customers. Effective advertising helps firms build brand loyalty and justify premium pricing without losing market share.

Low barriers to entry and exit allow new firms to enter the market when existing firms earn economic profits. As new competitors enter, market power erodes and profits decline toward normal levels. This continuous entry of new firms prevents sustained economic profits in the long run, distinguishing monopolistic competition from monopoly where barriers protect profits.

Product differentiation allows firms to charge different prices for similar products because consumers perceive meaningful differences in quality, brand, or features. Each firm's unique positioning creates a distinct market segment willing to pay premium prices. This explains why restaurants, retailers, and service providers offering comparable products maintain different price levels based on their differentiation strategy.

Consumers benefit from variety and choice, as firms offer differentiated products tailored to different preferences and budgets. Product differentiation encourages firms to compete on quality, service, and innovation rather than price alone. This market structure provides consumers with diverse options while maintaining competitive pressure that prevents excessive price increases.