Marginal value product

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Marginal value product (MVP, also marginal revenue product) is the market value of the output resulting from one additional unit of input

The marginal value product can be computed by multiplying the marginal product by the unit selling price of the additional output.[1]

Discounted marginal value product

The discounted MVP is simply the present market value of the (future) MVP.

Suppose, for example, that an additional hour of labor will generate $110 of additional revenue in one year's time. The MVP of this factor is $110. But this is a future good. The present value of the future good, and it is this present value that is now being purchased, will be equal to the MVP discounted by the going rate of interest. If the rate of interest is 10 percent, then the discounted MVP will be equal to $100. A prospective employer will pay no more than $100 today to hire this worker.[2]