Step 1: Understanding the Concept:
Market structures are classified into perfect competition, monopolistic competition, oligopoly, and monopoly based on the number of firms, product differentiation, barriers to entry, and control over prices.
Step 2: Detailed Explanation:
Let us analyze each statement to determine its truth value:
- Statement A: In a perfectly competitive market, there are many small firms selling homogeneous products.
Each firm is a "price taker" and has zero power to influence the market price.
Thus, Statement A is true.
- Statement B: Under monopolistic competition, products are highly differentiated.
Firms engage heavily in non-price competition, such as advertising, branding, and customer service, to attract buyers.
Thus, Statement B is true.
- Statement C: Oligopolistic markets are dominated by a few large, mutually interdependent firms.
These firms closely monitor the pricing strategies and product changes of their competitors to maintain market share.
Thus, Statement C is true.
- Statement D: A monopoly is defined as a market structure where there is a single seller of a product with no close substitutes.
The definition does not specify the physical size of the firm.
A monopolist can be a very small firm (for example, a single utility provider or grocery store in a remote village).
Thus, Statement D is false.
Step 3: Final Answer:
The false statement is: "A monopolist must be a large firm" (Option D).