The marginal product of an input is
A) always positive.
B) never positive.
C) usually positive.
D) always decreasing.
E) always increasing.

Question

Quizplus · Accepted Answer

The marginal product of an input measures the increase in total output resulting from a one-unit increase in the input, holding all other inputs constant. It can be positive, negative, or zero. However, if the input is used in the optimal quantity to produce a given level of output, the marginal product of that input will typically be positive. Therefore, the best choice is C, which states that the marginal product of an input is usually positive.

The Marginal Product of an Input Is