noun
diminishing returns
Economics term referring to the decrease in marginal output as a single factor of production is increased while others are held constant.
収穫逓減の法則は、経済学の基本的な概念の一つだ。
The law of diminishing returns is one of the fundamental concepts in economics.
Diminishing marginal utility, a related but distinct concept focusing on the decrease in satisfaction from consuming additional units.
Compound of 収穫 (harvest, yield) and 逓減 (gradual decrease). The term is a direct translation of the English 'diminishing returns' used in economics.