Marginal revenue

Marginal revenue or MR refers to the extra revenue a firm gains from selling one additional unit of output. This concept is central in economics, especially regarding firm behavior in various market structures. Marginal revenue helps businesses decide if producing and selling an extra unit increases profit, guiding output decisions. Firms should produce more as long as marginal revenue exceeds marginal cost up to the point where they are equal. Beyond that, increasing output reduces profits. In a perfectly competitive market, many small firms sell identical products and none can influence the market price. These firms are called price takers. For price takers, the market sets the price. So every unit sold brings the same additional revenue, meaning marginal revenue is constant and equal to market price. If the market price is $10, marginal revenue per unit is also $10. This creates a perfectly elastic or horizontal marginal revenue curve, so output decisions are based solely on costs. In a monopoly or other forms of imperfect competition, the firm faces a downward sloping demand curve, as it is the sole or dominant supplier. To sell more units, it usually must lower the price for all units, causing marginal revenue to be less than the price. The marginal revenue curve lies below the demand curve, declining faster than price as output increases. A monopolist maximizes profit, where marginal revenue equals marginal cost, then sets price using the demand curve,