What is the best definition of marginal revenue?


Marginal revenue (MR) is a fundamental concept in economics and business strategy that quantifies the change in total revenue resulting from producing and selling one additional unit of a product or service. It is essentially the revenue generated by selling one more unit, taking into account any changes in price or quantity sold.

To provide a precise definition, marginal revenue can be understood as the derivative of the total revenue function with respect to the quantity sold. In mathematical terms: MR=ΔTRΔQMR = \frac{\Delta TR}{\Delta Q} Where:

  • MRMR represents marginal revenue,
  • ΔTR\Delta TR denotes the change in total revenue,

ΔQ\Delta Q signifies the change in quantity sold.

Marginal revenue is a useful tool for businesses and economists to evaluate how adjustments to production levels or pricing policies impact revenue. Marginal revenue, for example, indicates how much more money is made per unit sold when a company decides to boost production and sell more units. Making judgments on the best production levels, pricing policies, and profit maximization all depend on this understanding.

Comprehending marginal income is also essential for assessing market competitiveness and behavior. Because businesses can sell every unit at the going rate without influencing demand, marginal revenue in fully competitive markets is equal to the product’s market price. However, marginal income may vary from the market price in imperfectly competitive markets where businesses have some degree of price control because to shifts in the elasticity of demand and the reactions of rivals.

Moreover, marginal revenue analysis is indispensable for firms in determining their profit-maximizing output levels. According to economic theory, a profit-maximizing firm will produce at a level where marginal revenue equals marginal cost (MC). If marginal revenue exceeds marginal cost, producing additional units increases profit. Conversely, if marginal revenue is less than marginal cost, producing more units would reduce profit.


In conclusion, marginal revenue is a critical metric that helps businesses understand the incremental impact of their production and pricing decisions on total revenue. By calculating and analyzing marginal revenue, firms can optimize their operations, respond strategically to market conditions, and enhance overall profitability in competitive environments. It serves as a key tool in economic analysis and business strategy, guiding firms towards efficient resource allocation and sustainable growth.

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