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The marginal cost can be either short-run or long-run marginal cost, depending on what costs vary with output, since in the long run even building size is chosen to fit the desired output. If the cost function C {\displaystyle C} is continuous and differentiable , the marginal cost M C {\displaystyle MC} is the first derivative of the cost ...
The long-run marginal cost curve is shaped by returns to scale, a long-run concept, rather than the law of diminishing marginal returns, which is a short-run concept. The long-run marginal cost curve tends to be flatter than its short-run counterpart due to increased input flexibility.
Economists tend to analyse three costs in the short-run: average fixed costs, average variable costs, and average total costs, with respect to marginal costs. The average fixed cost curve is a decreasing function because the level of fixed costs remains constant as the output produced increases.
This is stipulated under neoclassical theory, in which a firm maximizes profit in order to determine a level of output and inputs, which provides the price equals marginal cost condition. [5] [full citation needed] In the short run, a change in fixed costs has no effect on the profit maximizing output or price. [6]
Short-run equilibrium of the company under monopolistic competition. The company maximises its profits and produces a quantity where the company's marginal revenue (MR) is equal to its marginal cost (MC). The company is able to collect a price based on the average revenue (AR) curve.
Marginal costs are often also shown on these graphs, with marginal cost representing the cost of the last unit produced at each point; marginal costs in the short run are the slope of the variable cost curve (and hence the first derivative of variable cost).
The short-run optimal quantity of output occurs where marginal cost intersects marginal revenue (not shown; horizontal for a perfect competitor, otherwise downward sloped). If at this output level the height of the average revenue curve (not shown; horizontal for a perfect competitor, otherwise downward sloped) is less than the height of the ...
In economics, average fixed cost (AFC) is the fixed costs of production (FC) divided by the quantity (Q) of output produced. Fixed costs are those costs that must be incurred in fixed quantity regardless of the level of output produced. =. Average fixed cost is the fixed cost per unit of output.