The individual demand curve for an input such as labor to a firm would be the downward sloping portion of the firm's

Question

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The marginal revenue product (MRP) curve represents the value of each additional unit of input to the firm, and the individual demand curve for the input would be the portion of the MRP curve that is downward-sloping. This is because as the quantity of input increases, the marginal physical product and marginal revenue product both eventually decrease due to diminishing returns. The firm will therefore only hire additional units of input up to the point where the MRP equals the input's wage, which determines the firm's demand for the input.

The Individual Demand Curve for an Input Such as Labor