In a monopolistically competitive market, the number of firms adjusts until economic profits are driven to zero.

Monopolistically Competitive

A market structure where many firms sell products that are similar but not identical, leading to competition based on factors other than price.

Economic Profits

Economic profits are the surplus remaining after deducting both explicit and implicit costs from total revenue, reflecting the true profitability of a business.

Number of Firms

Refers to the total count of business entities participating in a particular market or industry.