The Law for Diminishing Marginal Returns

- As use of an input increases in equal increments, a point will be approched at which the resulting additions to output decreases (that is MP declines).

- When labor input is small, MP increases because of specialization.

- When labor input is large, MP decreases because of inefficiencies.

* The Law of Diminishing Marginal Returns

- Can be used for the long run decisions to assess tradeoffs of different plant configurations

- Assumes that the quality of variable input is constant

- Explains declining MP, not essentially a negative one

- Assumes a constant technology