Marginal Product
Marginal Product - Related Videos
01:22
Marginal Product II
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2024
The marginal product (MP) of a variable input measures the additional output produced by adding one more unit of that input, holding all other inputs constant. MP is typically studied in the short run, where at least one input (usually capital) is fixed. Production typically progresses through three stages. These stages are related to the marginal product of the variable input. The three stages are: Stage of Increasing Marginal Returns: In this initial phase, the addition of variable input...
01:19
Marginal Product I
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2024
The marginal product of an input refers to the additional output that can be produced by using an extra unit of that input while keeping other inputs constant. In the short run, labor is typically the variable input. So, the marginal product of labor refers to the additional output a firm can produce by employing an extra unit of labor. Mathematically, MPL = ΔQ / ΔL, where: ΔQ = Change in total output ΔL = Change in labor input Law of Diminishing Marginal Returns The Law of Diminishing Marginal...
01:15
The Marginal Product of Labor I
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2025
The marginal product of labor, or MPL, measures the increase in output resulting from an additional unit of labor. While doing this analysis, it is assumed that the other inputs are kept constant. For example, a firm may increase the number of workers from three to four. Its output rises from 300 units to 370 units. The marginal product of the newly hired labor is 70 units. This is the difference between the output with four workers (370 units) and the output with three workers (300 units).
01:24
The Marginal Product of Labor II
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2025
The marginal product of labor, or MPL, measures the increase in output that results from adding one more unit of labor, assuming the level of all other inputs remain constant. Calculating the Marginal Product of Labor The marginal product of labor is calculated as follows: MPL = (ΔQ/ΔL) where, MPL is the marginal product of labor ΔQ is the change in total output ΔL is the change in labor The marginal product of labor is subject to the law of diminishing returns. However, the falling...
01:23
Relation between Total Product, Marginal Product and Average Product
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2024
In the short run, a firm manufactures a product using a fixed amount of capital and varying numbers of workers. Its total product (TP) shows how much output can be produced in a specific period for each combination of labor and capital. Since capital is constant, the output varies with labor. Marginal product (MP) measures the additional output produced by adding one more unit of labor. It is calculated as the change in output divided by the change in labor quantity (ΔTP/ΔL). Average product...
FAQs
Marginal product describes how total product changes as a variable input changes, so it corresponds to the slope of the production relationship. With discrete observations, firms compare the change in output with the change in input quantity. In a production function, the same relationship can be represented mathematically by the relevant partial derivative.
Marginal product may decline because additional units of a variable input must operate alongside fixed resources. As the variable input grows while those resources remain unchanged, each added unit can contribute less additional output than the previous one. This pattern is the law of diminishing marginal returns and is especially relevant to short-run production decisions.
The relevant variable input can be labor, machinery, or raw materials, so marginal product evaluates the additional output associated with one more unit of whichever resource is being examined. Comparing these measures helps a firm assess where an additional resource may contribute most to production, while recognizing that the other inputs remain held constant in each analysis.
A calculation requires two observations of input quantity and the corresponding total-product levels. Subtract the earlier output from the later output, then divide that change by the change in the variable input. This procedure works with measured production data and identifies the additional output associated with the input increase without changing the other inputs.
Firms can use marginal product to evaluate whether additional workers, machinery, or raw materials are contributing meaningful increases in output. Comparing the additional output associated with alternative resources supports resource-allocation and hiring decisions. The analysis also reveals when adding more of a variable input produces smaller gains because fixed resources limit its contribution.
In the short run, some production resources remain fixed while a firm changes a variable input. If the marginal product of that input declines, each additional unit contributes less output under those fixed conditions. This production pattern helps explain why short-run cost behavior is connected to the productivity of variable resources.