law of diminishing returns

Law of Diminishing Returns The Law of diminishing returns is a key one in economics. It is used to explain many of the ways the economy works and changes. It is a relatively simple idea; spending and investing more and more in a product where one of the factors of production remains the same means the enterprise will eventually run out of steam. The returns will begin to diminish in the long run. If more fertilizer and better machinery are used on an acre of farmland, the yield will increase for a while but then begin to slow and become flat. A farmer can only get so much out of the land, and the more the farmer works, the harder it gets. The economic reason for diminishing returns of capital is as follows: When the capital stock is low, there are many workers for each machine, and the benefits of increasing capital further are great; but when the capital stock is high, workers already have plenty of capital to work with, and little benefit is to be gained from expanding capital furthe...