noun
law of diminishing returns; law of diminishing marginal returns
Economic principle that adding more of one input while holding others constant eventually yields smaller per-unit output increases.
収穫逓減の法則は、農業経済学でよく取り上げられる。
The law of diminishing returns is often discussed in agricultural economics.
A compound of 収穫 (harvest, yield), 逓減 (gradual decrease), and 法則 (law). The term is a direct translation of the English economic concept.