The world of microeconomics and business decision-making hinges upon a key concept: marginal cost. In the simplest terms, marginal cost represents the expense incurred to produce an additional unit of ...

What Is Marginal Propensity to Save? Marginal propensity to save (MPS) is used by economists to quantify the relationship between changes in income and changes in savings. It refers to the proportion ...

Elysse Bell is a finance and business writer for Investopedia. She writes about small business, personal finance, technology, and more. Erika Rasure is globally-recognized as a leading consumer ...

Economics is split between analysis of how the overall economy works and how single markets function Physicists look at the big world of planets, stars, galaxies, and gravity. But they also study the ...