CHANGE IN INVENTORIES: The increase or decrease in the stocks of final goods, intermediate goods, raw materials, and other inputs that businesses keep on hand to use in production the occur because aggregate expenditures are not equal to aggregate output. Inventory changes play a key role in the Keynesian economics and the analysis of macroeconomic equilibrium. When inventory changes are zero, then aggregate expenditures are equal to aggregate output and there is no reason for the business sector to change the rate of production. Hence this is equilibrium.

     See also | change in business inventories | planned investment | unplanned investment | actual investment | final good | intermediate good | raw materials | business sector | aggregate expenditures | aggregate output | business cycle | economic indicators |

CHANGE IN INVENTORIES, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: July 8, 2025].

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The recurring, but irregular, expansions and contractions of economic activity in the macroeconomy. While business cycles are frequently measured by real gross domestic product, they show up in many aggregate measures of economic activity, including the unemployment rate, the inflation rate, consumption expenditures, and tax collections, to name just a few. The study of macroeconomics is largely the study of business cycles. Macroeconomic theories seek to understand business cycles and macroeconomic policies seek to correct the problems of business cycles.

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